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Quickly Enable SSH on a Cisco Router or Switch
 
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This tutorial demonstrates how to quickly and easily enable SSH on a new Cisco router or switch. This will enable secure terminal sessions to the device without the risks associated with plain text protocols like telnet. Something happened towards the end where the video stops displaying what I am typing. Here is the command summary that I was trying to type: hostname ip domain-name crypto key generate rsa username priv 15 secret aaa new-model line vty 0 4 transport input ssh Remember, on a switch you need to use "line vty 0 15".
Views: 185061 NHGainesville
✅ How to Configure SSH on Cisco Router in Cisco Packet Tracer | SYSNETTECH Solutions
 
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How to Configure SSH on Cisco Router in Cisco Packet Tracer | SYSNETTECH Solutions ► Article ► https://goo.gl/Ghmd79 Read More ⬇️ ✅ S U B S C R I B E ► http://goo.gl/8d0iG9 This video shows you how to configure SSH on Cisco Router using the Cisco Packet Tracer network simulator program. To configure SSH on Cisco Packet Tracer: 1. If you have not installed Packet Tracer before, please refer to the following videos. Windows ➦ https://www.youtube.com/watch?v=pNLhTixgCXg Linux / Debian ➦ https://www.youtube.com/watch?v=aMnumAyFxCQ Linux / Linux Mint ➦ https://www.youtube.com/watch?v=VRmN0pDgLgo Linux / Ubuntu ➦ https://www.youtube.com/watch?v=rwGuAbiGPdc MacOS High Sierra ➦ https://www.youtube.com/watch?v=cXaqjFukSAI 2. After installing the Cisco Packet Tracer, add two Cisco routers, one Cisco Switch, and a PC in the workspace. 3. Before configuring SSH on Cisco Router, specify an IP block and assign IP addresses to the Cisco Router's interfaces and to the PC. 4. To configure SSH in Cisco Packet Tracer, open the Cisco Router CLI command prompt and run the following commands. Router(config)# hostname SSHRouter SSHRouter(config)# interface gigabitethernet 0/0 SSHRouter(config-if)# ip address 192.168.1.1 255.255.255.0 SSHRouter(config-if)# no shutdown %LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up SSHRouter(config-if)# exit SSHRouter(config)# ip domain name SSHRouter.com SSHRouter(config)# crypto key generate rsa <span style="color: #00ff00;">The name for the keys will be: SSHRouter.SSHRoutersolutions.com Choose the size of the key modulus in the range of 360 to 2048 for your General Purpose Keys. Choosing a key modulus greater than 512 may take a few minutes. How many bits in the modulus [512]: 1024 % Generating 1024 bit RSA keys, keys will be non-exportable...[OK] SSHRouter(config)# ip ssh version 2 *Mar 1 0:6:12.698: %SSH-5-ENABLED: SSH 1.99 has been enabled</span> SSHRouter(config)# ip ssh time SSHRouter(config)# ip ssh time-out 10 SSHRouter(config)# ip ssh authentication-retries 3 SSHRouter(config)# line vty 0 4 SSHRouter(config-line)# login local SSHRouter(config-line)# privilege level 15 SSHRouter(config-line)# transport input ssh SSHRouter(config-line)# exit SSHRouter(config)# username cisco privilege 15 password cisco123 SSHRouter(config)# end SSHRouter# wr 5. After configuring SSH on Cisco Router, run the following command on PC1's Command Prompt to make an SSH connection over PC1. ➦ ssh -l cisco 192.168.1.1 6. When you have made the SSH connection from the PC to Cisco Router, type the password for the username you created and press Enter. 7. You can see that an SSH connection was established from PC1 to Cisco Router. 8. To make an SSH connection from the Cisco Router to the Cisco Router, run the following command in Privileged Mode. ➦ ssh -l cisco 192.168.1.1 9. After enabling SSH on Cisco Packet Tracer, you can use the following commands to verify SSH. ➦ show ssh ➦ show ip ssh 10. Watch the entire video to configure SSH on Cisco Router using Cisco Packet Tracer. 11. Don't forget to subscribe to our YouTube channel! ➦ http://goo.gl/8d0iG9 ────────BEST PRODUCT FOR CISCO TRAINING───────── ✅ Buy ► http://bit.ly/CiscoNetworkingEssentials ───────────────RELATED VIDEOS─────────────── ➊ How to Configure Static NAT in Cisco Packet Tracer ➦ https://www.youtube.com/watch?v=ohvGuTPQ1SM ➋ How to Configure EIGRP in Cisco Packet Tracer ➦ https://www.youtube.com/watch?v=vhVmum82qjE ➌ How to Configure OSPF in Cisco Packet Tracer ➦ https://www.youtube.com/watch?v=xF4xd4cEDXg ➍ How to Configure NAT Overload in Cisco Packet Tracer ➦ https://www.youtube.com/watch?v=uF-4cxIJQ_E ➎ How to Configure Telnet on Cisco Router in Cisco Packet Tracer ➦ https://www.youtube.com/watch?v=meBU5RQGY9M ───────────────FOLLOW US─────────────────── ✔ Facebook ➦ https://www.facebook.com/SysnettechSolutions/ ✔ Google+ ➦ https://plus.google.com/u/0/+Tolgabagci/ ✔ Twitter ➦ https://twitter.com/SysnettechS/ ✔ Pinterest ➦ https://www.pinterest.com/SysnettechS/ ✔ Instagram ➦ https://www.instagram.com/sysnettech_solutions/ ✔ LinkedIn ➦ https://tr.linkedin.com/in/tolqabaqci/ ✔ StumbleUpon ➦ http://www.stumbleupon.com/stumbler/Sysnettech/ ███████████████████████████████████████████ ⚠️ ⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️ WE DON'T ALLOW VIDEOS ON OUR YOUTUBE CHANNEL TO BE SHARED USING THE API !!! Even if a video's sharing feature on our YouTube channel is enabled, it does not mean that you will share this video content without permission. If you do not take this warning into account, we have to send SPAM notification to Google. We will have to use force on the person or website owner who is continuing to spam. If you embed the video in an article on your website, we may allow it. Thank you for your understanding. ███████████████████████████████████████████
Views: 2170 SYSNETTECH Solutions
DES Structure   - Key Sheduling
 
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Key Shifting - https://www.youtube.com/watch?=v=KaH97OOzTAA
Views: 7352 Elroy Lee
✅ How to Configure SSH on Cisco Router in GNS3 | What is SSH | SYSNETTECH Solutions
 
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How to Configure SSH on Cisco Router in GNS3 | What is SSH | SYSNETTECH Solutions ► Article ► https://goo.gl/dLyJp2 Read More ⬇️ ✅ S U B S C R I B E ► http://goo.gl/8d0iG9 This video shows you how to configure SSH (Secure Shell) on Cisco Router using the GNS3 network simulator program. To configure SSH on GNS3: 1. If you have not installed GNS3 on Windows, Linux or MacOS before, please refer to the following videos. Windows ➦ https://www.youtube.com/watch?v=uhWt6TPNp-A Linux / Debian ➦ https://www.youtube.com/watch?v=_HsKS4iwr3M Linux / Linux Mint ➦ https://www.youtube.com/watch?v=XU6gf_Reiuk Linux / Ubuntu ➦ https://www.youtube.com/watch?v=8atzceBgN-c MacOS ➦ https://www.youtube.com/watch?v=MWStTRpwqBY 2. Once you have done the GNS3 setup, add the Cisco Router to GNS3. If you do not know how to do this, please refer to the following article. Article ➦ https://www.sysnettechsolutions.com/en/gns3/adding-cisco-ios-to-gns3/ 3. Add one Cisco Router, Cisco Switch, and Host to the GNS3 workspace to configure SSH on the Cisco Router. 4. Configure the Host settings to add a VMware virtual machine on GNS3. If you do not know how to use a virtual machine in GNS3, please refer to the following article. Article ➦ https://www.sysnettechsolutions.com/en/gns3/integrate-vmware-with-gns3/ 5. Once you have completed the necessary preparations for SSH configuration in GNS3, cable all devices in the workspace. 6. Specify a virtual machine on VMware for the host. Specify a VMnet in the VMware Virtual Network Editor program. 7. Assign an IP address for the VMnet that you created in the network settings of your physical computer. 8. To configure SSH on Cisco Router, open the CLI command prompt and run the following commands. R1# conf t R1(config)# interface fastethernet0/0 R1(config-if)# ip address 192.168.8.1 255.255.255.0 R1(config-if)# no shutdown R1(config-if)# exit R1(config)#ip domain-name sysnettechsolutions.com R1(config)#crypto key generate rsa general-keys modulus 1024 The name for the keys will be: R1.sysnettechsolutions.com % The key modulus size is 1024 bits % Generating 1024 bit RSA keys, keys will be non-exportable...[OK] R1(config)# ip ssh time-out 15 R1(config)# ip ssh authentication-retries 2 R1(config)# ip ssh version 2 R1(config)# username cisco privilege 15 password cisco123 R1(config)# line vty 0 4 R1(config-line)# login local R1(config-line)# privilege level 15 R1(config-line)# transport input ssh R1(config-line)# exit R1(config)# end R1# wr 9. After you enable SSH on Cisco Router, make an SSH connection to Cisco Router using Putty on the virtual machine. Use the following command to connect from the PC to the Cisco Router via SSH. ➦ ssh -I cisco 192.168.8.1 10. Likewise, you can use the following command in Privileged Mode to connect from the Cisco Router to the Cisco Router via SSH. ➦ ssh -I cisco 192.168.8.1 11. Watch the entire video to configure SSH on Cisco Router using GNS3. 12. Don't forget to subscribe to our YouTube channel. ➦ http://goo.gl/8d0iG9 What is SSH? Secure Shell (SSH) is a protocol which provides a secure remote access connection to network devices. Communication between the client and server is encrypted in both SSH version 1 and SSH version 2. Implement SSH version 2 when possible because it uses a more enhanced security encryption algorithm. ────────BEST PRODUCT FOR CISCO TRAINING────────── ✅ Buy ► http://bit.ly/CiscoNetworkingEssentials ───────────────RELATED VIDEOS─────────────── ➊ How to Configure Telnet on GNS3 ➦ https://www.youtube.com/watch?v=eiI_2srAyLM ➋ How to Configure Static NAT on GNS3 ➦ https://www.youtube.com/watch?v=2rnXtbEmwes ➌ How to Configure Dynamic NAT on GNS3 ➦ https://www.youtube.com/watch?v=CzxXWzY0c1U ➍ How to Configure EIGRP in GNS3 ➦ https://www.youtube.com/watch?v=rJC3UERvdnQ ➎ How to Configure OSPF in GNS3 ➦ https://www.youtube.com/watch?v=gFMvgpDSzlI ───────────────FOLLOW US─────────────────── ✔ Facebook ➦ https://www.facebook.com/SysnettechSolutions/ ✔ Google+ ➦ https://plus.google.com/u/0/+Tolgabagci/ ✔ Twitter ➦ https://twitter.com/SysnettechS/ ✔ Pinterest ➦ https://www.pinterest.com/SysnettechS/ ✔ Instagram ➦ https://www.instagram.com/sysnettech_solutions/ ✔ LinkedIn ➦ https://tr.linkedin.com/in/tolqabaqci/ ✔ StumbleUpon ➦ http://www.stumbleupon.com/stumbler/Sysnettech/ ███████████████████████████████████████████ ⚠️ ⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️ WE DON'T ALLOW VIDEOS ON OUR YOUTUBE CHANNEL TO BE SHARED USING THE API !!! Even if a video's sharing feature on our YouTube channel is enabled, it does not mean that you will share this video content without permission. If you do not take this warning into account, we have to send SPAM notification to Google. We will have to use force on the person or website owner who is continuing to spam. If you embed the video in an article on your website, we may allow it. Thank you for your understanding. ███████████████████████████████████████████
Public Key Cryptography - Computerphile
 
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Spies used to meet in the park to exchange code words, now things have moved on - Robert Miles explains the principle of Public/Private Key Cryptography note1: Yes, it should have been 'Obi Wan' not 'Obi One' :) note2: The string of 'garbage' text in the two examples should have been different to illustrate more clearly that there are two different systems in use. http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 421507 Computerphile
RSA Algorithm with solved example using extended euclidean algorithm | CSS series #7
 
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#rsa #deffiehellman #cryptographylectures #lastmomenttuitions Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 267123 Last moment tuitions
Blockchain tutorial 29: Hierarchical Deterministic wallet - BIP32 and BIP44
 
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This is part 29 of the Blockchain tutorial. In this video series different topics will be explained which will help you to understand blockchain. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. DETERMINISTIC WALLET BIP-39 describes how the mnemonic words are created. These mnemonic words together with a password (optionally) are used to generate a 512 bit seed. The 512 bit seed is also called the "BIP-39 seed". This seed is used to create deterministic wallets. There are two types of deterministic wallets: - Sequential deterministic wallets. - Hierarchical deterministic wallets. SEQUENTIAL DETERMINISTIC WALLET Sequential deterministic wallets generates private keys for example by taking SHA256(seed + n) HIERARCHICAL DETERMINISTIC WALLET Nowadays most wallets are Hierarchical Deterministic (HD) wallets. More information: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki Most HD wallet vendors have implemented BIP-32, BIP-39 and BIP-44. These 3 Bitcoin Improvement Proposals are becoming an industry standard. BIP-39 BIP-39 describes the implementation of mnemonic words to generate a 512 bit seed. More information: https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki BIP-32 BIP-32 describes how you can build a general hierarchical deterministic wallet. More information: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki https://bitcoin.org/en/developer-guide#hierarchical-deterministic-key-creation If you want to see how BIP32 is implemented in the bitcoinjs library, see: https://raw.githubusercontent.com/bitcoinjs/bitcoinjs-lib/master/src/hdnode.js Online web application: https://www.mobilefish.com/download/ethereum/hd_wallet.html BIP-32 explains how master keys and master chain code are created from a BIP-39 seed. The chain code is used as entropy in the Child Key Derivation function. Using different index numbers will create different unlinkable child keys from the same parent keys. Repeating the procedure for the child keys using the child chain code will create unlinkable grandchild keys. By changing the chain code, a new node (aka wallet) is created. Extended private (xprv) keys can create a complete branch with child private keys and child public keys Extended public (xpub) keys can only generate public keys. BIP-44 BIP-44 defines a specific logical hierarchy for deterministic wallets based on an algorithm described in BIP-32. More information: https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki BIP-44 uses the following derivation path: m/purpose'/coin_type'/account'/change/address_index The letter m denotes the master node and all hierarchical levels are separated with slashes (/). m is level 0, purpose is level 1, coin_type is level 2 etc. The purpose scheme is described in BIP-43. Because we are using BIP44 scheme we should use 44'. The apostrophe (for example in purpose') indicates hardened derivation. More information: https://github.com/satoshilabs/slips/blob/master/slip-0044.md account level can be seen as bank account types, for example payment account, savings account etc. change level is also known as "external / internal level" where external (0) is used for addresses that are meant to be visible outside of the wallet (receiving payments) and internal (1) is used for addresses which are not meant to be visible outside of the wallet (signing transactions). address_index is a sequence of addresses starting at 0. BIP-44 XPRV AND XPUB DEMONSTRATION Suppose a webshop wants to receive payments in only in ETH. For each payment received a different Ethereum address must be used. The webshop should use a wallet containing only public keys. The webshop wallet uses a xpub key with derivation path: m/44'/60'/0'/0 This wallet creates the following addresses: m/44'/60'/0'/0/0 m/44'/60'/0'/0/.. The accounting department uses another wallet containing the same public keys AND accompanied private keys. The accounting department can transfer payments made on these public addresses and transfer it to a separate accounting address. This is possible because they have access to the private keys. The accounting department wallet uses a xprv key with the same derivation path: m/44'/60'/0'/0 BIP-32 RISK If a hacker gets it hands on any child private key and the account xpub key, the hacker can recompute the account xprv key and thus have access to every private and public key descending from the account level. More information: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#implications Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 9672 Mobilefish.com
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 470141 itfreetraining
Cryptography Fundamentals: Creating or Generating Keys
 
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This video is a sample from Skillsoft's video course catalog. After watching it, you will be able to describe the creating, or generating, of keys and how the key strength is critical to cryptographic ciphers. Dan Lachance has worked in various IT roles since 1993 including as a technical trainer with Global Knowledge, programmer, consultant, as well as an IT tech author and editor for McGraw-Hill and Wiley Publishing. He has held and still holds IT certifications in Linux, Novell, Lotus, CompTIA, and Microsoft. His specialties over the years have included networking, IT security, cloud solutions, Linux management, and configuration and troubleshooting across a wide array of Microsoft products. Skillsoft is a pioneer in the field of learning with a long history of innovation. Skillsoft provides cloud-based learning solutions for our customers worldwide, who range from global enterprises, government and education customers to mid-sized and small businesses. Learn more at http://www.skillsoft.com. https://www.linkedin.com/company/skillsoft http://www.twitter.com/skillsoft https://www.facebook.com/skillsoft
Views: 309 Skillsoft YouTube
RSA encryption (and decryption!)
 
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A video on the VERY general basics of RSA encryption!
Views: 18 Sarah Wood
Applied Cryptography: RSA - Finding Large Primes - Part 1
 
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This video gives an introduction and motivation about finding large prime numbers for the RSA. General ideas are discussed.
Views: 1631 Leandro Junes
How to generate SSH keys on a Mac
 
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How to generate SSH public and private keys using a Mac for RDSI SFTP access
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 620533 Art of the Problem
Packet Tracer 2.2.1.4 - Configuring SSH Instruction - CCNA 2 - Chapter 2
 
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Packet Tracer - Configuring SSH Objectives Part 1: Secure Passwords Part 2: Encrypt Communications Part 3: Verify SSH Implementation Background SSH should replace Telnet for management connections. Telnet uses insecure plain text communications. SSH provides security for remote connections by providing strong encryption of all transmitted data between devices. In this activity, you will secure a remote switch with password encryption and SSH. Part 1: Secure Passwords a. Using the command prompt on PC1, Telnet to S1. The user EXEC and privileged EXEC password is cisco. b. Save the current configuration so that any mistakes you might make can be reversed by toggling the power for S1. c. Show the current configuration and note that the passwords are in plain text. Enter the command that encrypts plain text passwords: ____________________________________________________________________________________ d. Verify that the passwords are encrypted. Part 2: Encrypt Communications Step 1: Set the IP domain name and generate secure keys. It is generally not safe to use Telnet, because data is transferred in plain text. Therefore, use SSH whenever it is available. a. Configure the domain name to be netacad.pka. b. Secure keys are needed to encrypt the data. Generate the RSA keys using a 1024 key length. Step 2: Create an SSH user and reconfigure the VTY lines for SSH-only access. a. Create an administrator user with cisco as the password. b. Configure the VTY lines to check the local username database for login credentials and to only allow SSH for remote access. Remove the existing vty line password. Part 3: Verify SSH Implementation a. Exit the Telnet session and attempt to log back in using Telnet. The attempt should fail. b. Attempt to log in using SSH. Type ssh and press Enter without any parameters to reveal the command usage instructions. Hint: The -l option is the letter “L”, not the number 1. c. Upon successful login, enter privileged EXEC mode and save the configuration. If you were unable to successfully access S1, toggle the power and begin again at Part 1.
Views: 12246 Astrit Krasniqi
How to Install an ASA VPN (SSL) Certificate: Cisco ASA Training 101
 
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http://www.soundtraining.net-cisco-asa-training-101 Learn how to generate a CSR (Certificate Signing Request) to submit to a CA (Certificate Authority) and how to install the signed certificate from the CA. In this Cisco ASA tutorial, IT author-speaker Don R. Crawley shows you the basics of digital certificate management using a combination of the CLI (command line interface) and the GUI (graphical user interface) on a Cisco ASA Security Appliance.
Views: 111559 soundtraining.net
Chapter 4 Part-11: SSH { Access & Password } - (Hindi) | Tech Forest | CCNA R&S | By Bhavesh Pandey
 
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How to access router remotely SSH ============================================== General-Pre Requirement (1) Virtual line should be ON with password (2) enable password required to access router remotly (3) IP address with no shut cmd line vty 0 15 password ccna login exit enable password ccnaenable =============================================== Requirement for SSH (1)Hostname (2)Domain Name (3)Secure Key (4)SSH version 2 (5)Create user (6)Login local* hostname BP ip domain-name techforest.co.in crypto key generate rsa 1024 ip ssh version 2 username bhavesh password pandey line vty 0 15 login local ip address to pc ping your router ssh -l bhavesh 192.168.1.1
Views: 161 Tech Forest
RSA Algorithm with Example | Asymmetric Key Cryptography (Public Key Cryptography)
 
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In this network security video tutorial we will study the working of RSA Algorithm. RSA Algorithm theory - 1. Ron Rivest, Adi Shamir and Len Adlemen developed the method called as RSA algorithm. 2. Most popular and proven asymmetric key cryptography algorithm 3. Based on the mathematical fact that it is easy to find and multiply large prime numbers together, but it is extremely difficult to factor their product. RSA Algorithm Steps - 1. Choose two large prime numbers P and Q. 2. Calculate N = P * Q 3. Select the public key (i.e. the encryption key) E such that it is not a factor of [(P – 1) * (Q – 1)]. 4. Select the private key (i.e. the decryption key) D such that the following equation is true: (D * E) mod (P – 1) * (Q – 1) = 1 5. For encryption calculate the cipher text CT from the plain text PT as follows: CT= PT^E mod N 6. Send CT as the cipher text to the receiver 7. For decryption calculate the plain text PT from the cipher text CT as follows: PT = CT^D mod N Complete Network Security / Information Security Playlist - https://www.youtube.com/watch?v=IkfggBVUJxY&list=PLIY8eNdw5tW_7-QrsY_n9nC0Xfhs1tLEK Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - http://simplesnippets.tech/ Simple Snippets on Facebook - https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram - https://www.instagram.com/simplesnippets/ Simple Snippets on Twitter - https://twitter.com/simplesnippet Simple Snippets Google Plus Page - https://plus.google.com/+SimpleSnippets Simple Snippets email ID - [email protected] For More Technology News, Latest Updates and Blog articles visit our Official Website - http://simplesnippets.tech/ #RSA #RSAalgorithm #NetworkSecurity #AsymmetricCryptography
Views: 970 Simple Snippets
Creating SSH Keys in Windows - Using PuttyGen | by Chubbable
 
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This is how you would create a SSH Keys under Windows XP/7/8. Download puttygen.exe and launch it. Then start to generate the keys.
Views: 50102 Chubbable
2.4.1 RSA Public Key Encryption: Video
 
21:45
MIT 6.042J Mathematics for Computer Science, Spring 2015 View the complete course: http://ocw.mit.edu/6-042JS15 Instructor: Albert R. Meyer License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 17901 MIT OpenCourseWare
New Crypto Key Storage Options in the Google Cloud Platform (Cloud Next '18)
 
50:03
Efficient key management and data-at-rest encryption in GCP is possible today through Cloud KMS. Using Cloud KMS, applications have access to industry compliant symmetric key cryptography to either directly encrypt blocks of data or manage the keys used in other GCP services. But what if you need more? Come to this session to learn about the great new enhancements coming to Cloud KMS and key management in general. SEC210 Event schedule → http://g.co/next18 Watch more Security sessions here → http://bit.ly/2zJTZml Next ‘18 All Sessions playlist → http://bit.ly/Allsessions Subscribe to the Google Cloud channel! → http://bit.ly/NextSub
Securing Stream Ciphers (HMAC) - Computerphile
 
09:24
Bit flipping a stream cipher could help you hit the Jackpot! But not with HMAC. Dr Mike Pound explains. Correction : "pseudo" is spelled incorrectly on the graphic. http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 108922 Computerphile
How to set up Secure Shell (SSH) in Cisco Packet Tracer
 
02:38
How to set up Secure Shell (SSH) in Cisco Packet Tracer What is Secure Shell (SSH) you might ask!? SSH protocol uses public-key cryptography to authenticate the remote computer and allow it to authenticate the user, if necessary. There are several ways to use SSH; one is to use automatically generated public-private key pairs to simply encrypt a network connection, and then use password authentication to log on. Out side of PT, on a real computer you can use the program called putty to SSH in to your interfaces.
Views: 14706 Jordan Taylor
Encryption and HUGE numbers - Numberphile
 
09:22
Banks, Facebook, Twitter and Google use epic numbers - based on prime factors - to keep our Internet secrets. This is RSA public-key encryption. More links & stuff in full description below ↓↓↓ Gold Vault: https://youtu.be/CTtf5s2HFkA This video features Dr James Grime (http://singingbanana.com/). Message from James: "Thanks to Dr Chris Hughes of the University of York who showed me how to find the RSA public key from my browser, and showed me how awesome they look when you print them out." Regarding the keys used for encryption: x, y prime Encode key E shares no factors with (x-1)(y-1) Decode key is D with E*D - 1 a multiple of (x-1)(y-1) Thanks to Drew Mokris for the animation: http://www.spinnerdisc.com/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile
Views: 1023223 Numberphile
Will Quantum Computers break encryption?
 
15:45
How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 609703 Frame of Essence
How Internet Encryption Works - Diffie Hellman Public Key Cryptography
 
16:23
In this video, we learn how internet encryption works to secure your data. Diffie Hellman is the most popular form of internet encryption. It allows two or more parties to exchange information securely. We look at how it works, in general, and then we look at the specific equations that are behind it. We also discuss downfalls with Diffie Hellman, which now requires 2048 bit keys, and the potential for Elliptic Curve Cryptography. For all your Global IT Security Needs, in Edmonton, AB and around the world: Call us 24/7 at 1 866 716 8955 / 780 628 1816 Visit us at https://www.hsmitservices.com/network-security We'll take care of you!
Views: 279 HSM IT Services
Cisco Passwords - Enforcing Minimum Password Length - Part 2
 
09:45
Enforcing Minimum Password Length - Part 2 of 3 While in most production environments usernames and passwords will be handled by an authentication server such as TACACS+ or RADIUS, you will still need to configure passwords on the local device for some operations. In such cases, it's good to have a password policy in effect. While Cisco IOS does not provide mechanisms to meet all of the general password best practices, it does provide a mechanism for one of the most basic and important best practices: enforcing a minimum password length policy. security passwords min-length allows you to specify a minimum password length between 0 and 16 characters.
Views: 539 packetlab
16 Cryptography Algorithms and Protocols
 
38:21
Video 16 - "Cryptography Algorithms and Protocols" - This second nugget of the Cryptography domain lays out hashing concepts and algorithms like MD5 and SHA. Basic algorithms and encryption concepts are explored including: DES, 3DES, RSA, PGP, Elliptic curve (ECC), AES/AES256, One time pad, SSL/TLS, S/MIME, and PPTP/L2TP.
Views: 13158 SwampTarts
Cisco Passwords - Enforcing Minimum Password Length - Part 1
 
09:22
Enforcing Minimum Password Length - Part 1 of 3 While in most production environments usernames and passwords will be handled by an authentication server such as TACACS+ or RADIUS, you will still need to configure passwords on the local device for some operations. In such cases, it's good to have a password policy in effect. While Cisco IOS does not provide mechanisms to meet all of the general password best practices, it does provide a mechanism for one of the most basic and important best practices: enforcing a minimum password length policy. security passwords min-length allows you to specify a minimum password length between 0 and 16 characters.
Views: 839 packetlab
Dual Server Public Key Encryption with keyword search for secure cloud storage
 
11:50
Dual Server Public Key Encryption with keyword search for secure cloud storage Abstract: Searchable encryption is of increasing interest for protecting the data privacy in secure searchable cloud storage. In this paper, we investigate the security of a well-known cryptographic primitive, namely, public key encryption with keyword search (PEKS) which is very useful in many applications of cloud storage. Unfortunately, it has been shown that the traditional PEKS framework suffers from an inherent insecurity called inside keyword guessing attack (KGA) launched by the malicious server. To address this security vulnerability, we propose a new PEKS framework named dual-server PEKS (DS-PEKS). As another main contribution, we define a new variant of the smooth projective hash functions (SPHFs) referred to as linear and homomorphic SPHF (LH-SPHF). We then show a generic construction of secure DS-PEKS from LH-SPHF. To illustrate the feasibility of our new framework, we provide an efficient instantiation of the general framework from a Decision Diffie-Hellman-based LH-SPHF and show that it can achieve the strong security against inside the KGA. SIMILAR VIDEOS: https://www.youtube.com/watch?v=AZI6oHAEtU8 https://www.youtube.com/watch?v=o0mT99zKAqA https://www.youtube.com/watch?v=X7jZtTq74WU https://www.youtube.com/watch?v=EO1rgFk07kQ https://www.youtube.com/watch?v=ACtU9aaoh_8 https://www.youtube.com/watch?v=cbZFKV4A0X8 https://www.youtube.com/watch?v=AWcD3pIGJjI https://www.youtube.com/watch?v=0y5w5CbMips https://www.youtube.com/watch?v=rhCtDFPNHCE https://www.youtube.com/watch?v=t41nfgBy8pY https://www.youtube.com/watch?v=LLUlzVlIJOw https://www.youtube.com/watch?v=mSjS4IGyrW0 https://www.youtube.com/watch?v=1TnAqAkxuws https://www.youtube.com/watch?v=nxoUUe8rrtQ https://www.youtube.com/watch?v=XBzwg1EY2SI https://www.youtube.com/watch?v=RRVWWUd9NLk https://www.youtube.com/watch?v=Es0eHDHksiM https://www.youtube.com/watch?v=x5CAAPGuo3g https://www.youtube.com/watch?v=sQKIpfEpQmo https://www.youtube.com/watch?v=hcmrJkwn1T4 https://www.youtube.com/watch?v=cNw3u68a424 https://www.youtube.com/watch?v=6sKfA1vFZBA https://www.youtube.com/watch?v=cFsryGMYxIE For More Videos - https://www.youtube.com/channel/UCR5lsF-lDQu6rVYVJPqNn6Q SOCIAL HANDLES: SCOOP IT- http://www.scoop.it/u/1croreprojects FACEBOOK - https://www.facebook.com/1Croreprojectsieeeprojects/ TWITTER - https://twitter.com/1crore_projects LINKEDIN - https://www.linkedin.com/in/1-crore-projects-ba982a118/ GOOGLE+ - https://plus.google.com/u/0/105783610929019156122 PINTEREST - https://in.pinterest.com/onecroreproject/ BLOG - 1croreprojectz.blogspot.com DOMAIN PROJECTS DOTNET - http://www.1croreprojects.com/dotnet-ieee-project-centers-in-chennai.php JAVA - http://www.1croreprojects.com/java-ieee-projects-chennai.php EMBEDDED - http://www.1croreprojects.com/embedded-systems-ieee-projects-chennai.php MATLAB - http://www.1croreprojects.com/matlab-ieee-projects-chennai.php NS2 - http://www.1croreprojects.com/ns2-ieee-projects-chennai.php VLSI -http://www.1croreprojects.com/vlsi-ieee-projects-chennai.php FOR PROJECTS - http://www.1croreprojects.com/ BUSINESS CONTACT: Email - [email protected] We are always open for all business prospects. You can get in touch which us, using the above mentioned e-mail id and contact number. ABOUT 1CROREPROJECTS: 1Crore Projects is company providing outstanding, cost-effective, effective result authorized on solutions. Our objective is to create solutions that enhance company process and increase come back in most possible time. We started truly to provide solutions to the customers all over the world. We have been effectively in providing solutions for different challenges across a wide range of market and customers propagate across the globe.
Views: 1281 1 Crore Projects
MD5 Algorithm in Hindi
 
17:29
Md5 algorithm explained in hindi. Di like, share and subscribe.
Views: 24956 Rudra Singh
Cryptography in JavaScript
 
25:09
Speaker: Demian Kostelny, Software Developer. The talk was presented at the Dynamic Talks #4 in Lviv.
Views: 173 Grid Dynamics
SSL Certificate Error Fix
 
03:01
This is a tutorial on how to fix the ssl error or 107 error,in google applications.
Views: 631174 Ilya Novickij
Why Utimaco HSMs are the cryptographic device of choice for Bank-Verlag #PartnersAreKey
 
02:35
In this video, Alexander Eßer, PM Security & Trusted Services at Bank-Verlag, describes why Utimaco HSMs are the cryptographic device of choice to manage the generation of qualified signatures and securely generate and store the related qualified certificates and cryptographic keys. As a service provider for banks in Germany, Bank-Verlag is active in the areas of Payment Solutions, eBanking, Security, Bank Management, Compliance and Risk Management. Bank-Verlag is currently in the process of becoming a TSP. Utimaco is a leading manufacturer of Hardware Security Modules (HSMs) that provide the Root of Trust to all industries, from financial services and payment to the automotive industry, cloud services to the public sector. We keep your cryptographic keys and digital identities safe in order to protect critical digital infrastructures and high value data assets. Our products enable innovations and support the creation of new business by helping to secure critical data and transactions. Utimaco delivers a comprehensive product family of HSMs. Each of our hardware models can be deployed as a general purpose HSM for easy integration into existing software solutions. They can also be customized to enable the development of new solutions. With our professional services, we support our partners to implement their solutions. #PartnersAreKey For more information, please visit: ▸Utimaco HSM: https://hsm.utimaco.com ▸Bank-Verlag: https://www.bank-verlag.de/ ▸LinkedIn: https://www.linkedin.com/company/utimaco ▸Twitter: https://twitter.com/utimaco
Views: 107 Utimaco
Cryptography, Cryptographic Security Controls & Cryptography Security Techniques Explained
 
16:57
Thanks For Watching This Video, I Hope You Must Have Liked It. If yes then please hit the subscribe button as I will be uploading a lot of IT security related training videos on this channel and if you will be my subscriber then you my friend will be the first one who will be notified about all my new videos my friend. If you have any questions for the topic that I have discussed in this video then please feel free to comment my friend and I will be happy to respond back to your queries... Please note that - all ISO 27001 documents and standards are completely owned intellectual property & copyright of ISO. So in case if by any chance you are interested to study more about the standard that I have discussed here then please go to the official ISO website in order to purchase the standards. This channel is only created to generate awareness and best practices for Information Security in general and if by any chance you wish to implement any of the standards that I have discussed here then you have to first purchase them from official ISO website. This channel is only created to help anyone who is currently studying or planning to study about ISMS Information Security Management System ISO 27001 Implementation. I want to make my contribution in the information security community.This channel is only created to generate awareness and best practices for Information Security in general. Disclaimer: Since ISO 27001 is a very vast topic and the implementation varies for all organization's so I can't ever call myself an "expert" in this field, all the knowledge and information that I am sharing here is only based upon my past experience in information security field and may not be directly applicable within your organization as such. So please use your judgement before implementing anything based upon my suggestions. I request you not to rely on anything that I say here, I do my best to be as accurate and as complete information that I can provide you “but” only the published standards are definitive. Only the published ISO standards stand above any information that I have shared in any of my videos. Thanks, Your IT Security Friend Luv Johar Website : http://aajkatech.com/ iso 27001 explained, iso 27001 awareness trainings, iso 27001 free trainings online, Iso 27001 free tutorials, ISO 27001 training material free, lead auditor free training course, lead implementer free training course, ISMS training free, information security management system training free,
Security Topics in Open Cloud: Advanced Threats, 2015's Vulnerabilities ...
 
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Jason Cohen https://linux.conf.au/schedule/30298/view_talk This talk will present an assortment of security topics related to Open Source Cloud Computing technologies. Topics will include an overview of the most significant security flaws discovered over the last year in popular cloud platforms, the generic foundations of advance persistent threats, and some of the recent countermeasures of encryption, key management, and platform validation being introduced into OpenStack and Hadoop. A demo of Trusted Compute Pools will also be given and an explanation of what types of advanced threats it protects against will be provided. It would seem that, despite the exponential growth in security products, security services, security companies, security certifications, and general interest in the security topic; we are still bombarded with a constant parade of security vulnerability disclosures on a seemingly daily basis. Knowing that complete protection from threats and vulnerabilities at the front end of the infrastructure is impossible and that advanced threats will find their way past our defenses, efforts to protect the data and the ‘keys to the castle’ being the last line of defense are even more critical. The hardware enabling ‘trusted computing’ is referred to as a Trusted Platform Module (TPM), and is designed as a commodity chip that is integrated into motherboards, as well as appliances such as network switches, firewalls, and embedded devices. The TPM provides features that are useful in providing assurances about the state of a platform and protecting sensitive information. Essentially, the chip can be used to generate, store, and protect encryption keys. It also provides a mechanism to store information about the state of a platform through a traceable, cryptographic mechanism, which can be securely attested to a remote verifier. TPMs have been around for a while but have had a slow uptake in actual use until recently due to initial privacy concerns that have been mostly overcome. Many cloud deployments include hardware with a TPM, but it is rarely used. Championed by Intel and others, support for using the TPM and related Intel TXT to provide remote attestation has been included in OpenStack in the form of Trusted Compute Pools. This feature can detect systems within the cloud that have booted untrusted code and block guests from executing on them. This will be demo’ed on a live system. Of course, this boot time detection of untrusted code is beneficial, there are other ways a TPM could be utilized to better protect user or application data via strong and cheap protection of keys. Work being done in OpenStack to utilize the TPM for key protection will also be discussed. In addition, when configuring bare metal systems, there are many other ways to use the TPM such as with the IMA/EVM subsystem or by using the TPM to protect keys used in disk encryption, applications, or user data. Some of the common tools for using TPMs on bare metal systems will be enumerated. Lastly, although not necessarily a ‘cloud’ platform, Hadoop is a mainstay in the related field of big data. Until recently, the lack of block level encryption has been an issue for organizations looking to protect Hadoop data. We will discuss the architecture of the Hadoop encryption framework and considerations for key protection.
JSCS User registration
 
02:01
JSCS - Javacard-based Secret Communication System [Demonstration] Input username and PIN Generate RSA public/private key-pair for the user Store server public key and user key-pair on user Javacard Update user info file
Views: 166 hkucsJSCS
MD5 in Hindi - Message Digest, Hash Functions, Working and Operation of MD5 - Network Security
 
21:14
MD5 in Hindi - Message Digest, Hash Functions, Working and Operation of MD5 - Network Security Hash Functions – Features, Properties, Working of MD5, Operation of MD5 #MD5 Computer Network Security(CNS) Lectures – Internet Security
[Java] - Crypto Demo - Encryption for Text (use with email or chat)
 
03:59
Don't Forget to ****************** ╔═╦╗╔╦╗╔═╦═╦╦╦╦╗╔═╗ ║╚╣║║║╚╣╚╣╔╣╔╣║╚╣═╣ ╠╗║╚╝║║╠╗║╚╣║║║║║═╣ ╚═╩══╩═╩═╩═╩╝╚╩═╩═╝ ************************************* GitHub Link - https://github.com/lemon65/Crypto Hey YouTube I just want to say First off Thanks For Watching! Second I want to describe my general videos to you, well this is mostly a channel that hosts me and my friends gaming, as well as it might have a few how to videos ... where you might learn a few things. Also if you have any video ideas or suggestions I would LOVE to hear them.... and once more Thanks for watching!
Views: 314 MrLemon65
22. Cryptography: Encryption
 
01:24:15
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 16635 MIT OpenCourseWare
Black Hat USA 2013 - The Factoring Dead: Preparing for the Cryptopocalypse
 
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By: Alex Stamos, Tom Ritter, Thomas Ptacek & Javed Samuel The last several years has seen an explosion of practical exploitation of widespread cryptographic weaknesses, such as BEAST, CRIME, Lucky 13 and the RC4 bias vulnerabilities. The invention of these techniques requires a lot of hard work, deep knowledge and the ability to generate a pithy acronym, but rarely involves the use of a completely unknown weakness. Cryptography researchers have known about the existence of compression oracles, RC4 biases and problems with CBC mode for years, but the general information security community has been unaware of these dangers until fully working exploits were demonstrated. In this talk, the speakers will explain the latest breakthroughs in the academic crypto community and look ahead at what practical issues could arise for popular cryptosystems. Specifically, we will focus on the latest breakthroughs in discrete mathematics and their potential ability to undermine our trust in the most basic asymmetric primitives, including RSA. We will explain the basic theories behind RSA and the state-of-the-art in large numbering factoring, and how several recent papers may point the way to massive improvements in this area. The talk will then switch to the practical aspects of the doomsday scenario, and will answer the question "What happens the day after RSA is broken?" We will point out the many obvious and hidden uses of RSA and related algorithms and outline how software engineers and security teams can operate in a post-RSA world. We will also discuss the results of our survey of popular products and software, and point out the ways in which individuals can prepare for the zombi^H^H^H crypto apocalypse.
Views: 2983 Black Hat
SHA: Secure Hashing Algorithm - Computerphile
 
10:21
Secure Hashing Algorithm (SHA1) explained. Dr Mike Pound explains how files are used to generate seemingly random hash strings. EXTRA BITS: https://youtu.be/f8ZP_1K2Y-U Tom Scott on Hash Algorithms: https://youtu.be/b4b8ktEV4Bg http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 452673 Computerphile
On the Power of Public-key Encryption in Secure Computation
 
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Eleventh IACR Theory of Cryptography Conference TCC 2014 February 24-26, 2014 Mohammad Mahmoody and Hemanta K. Maji and Manoj Prabhakaran
Views: 126 Calit2ube
26 Cryptography Domain Update
 
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Video 26 - UPDATE regarding Cryptography Algorithms and Protocols, plus Cryptography Domain. Cryptography domain lays out hashing concepts and algorithms like MD5 and SHA. Basic algorithms and encryption concepts are explored including: DES, 3DES, RSA, PGP, Elliptic curve (ECC), AES/AES256, One time pad, SSL/TLS, S/MIME, and PPTP/L2TP. Cryptography domain lays out the core concepts of a Public Key Infrastructure (PKI).
Views: 113 SwampTarts
Project 3 Description (DES)
 
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The description of the 3rd project for CSCI 360, Cryptography. It concerns DES.
Views: 115 Hunter Johnson
17 - Jean Lancrenon - On Password-Authenticated Key Exchange Security Modeling
 
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On Password-Authenticated Key Exchange Security Modeling Abstract: Deciding which security model is the right one for Authenticated Key Exchange (AKE) is well-known to be a difficult problem. In this paper, we examine definitions of security for Password-AKE (PAKE) in the style proposed by Bellare et al. at Eurocrypt 2000. Indeed, there does not seem to be any consensus, even when narrowing the study down to this particular authentication method and model style, on how to precisely define fundamental notions such as accepting, terminating, and partnering. The aim of this paper is to begin addressing this problem. We first show how definitions vary from paper to paper. We then propose and thoroughly motivate a definition of our own, and use the opportunity to correct a minor flaw in a more recent and more PAKE-appropriate model proposed by Abdalla et al. at Public Key Cryptography 2005. Finally, we argue that the uniqueness of partners holding with overwhelming probability ought to be an explicitly required and proven property for AKE in general, but even more so in the password case, where the optimal security bound one aims to achieve is no longer a negligible value. To drive this last point, we exhibit a protocol that is provably secure following the Abdalla et al. definition, and at the same time fails to satisfy this property. -- Jean Lancrenon has been a research associate at SnT since January 2012, in Prof. Peter YA Ryan’s group (ApSIA). He obtained his PhD from the Université Joseph Fourier (Grenoble, France) in June 2011. His research mainly focuses on the security modeling of cryptographic services with a particular emphasis on authenticated key exchange protocols.
Views: 323 Per Thorsheim
Totty- An Introduction to OpenSSH for System Administrators and Students
 
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Security is of great concern in the information technology world. Bank transaction, medical records, and stock exchanges are only a few examples of sensitive information that needs to be encrypted during transaction to protect the privacy of the data being transmitted. OpenSSH is an open source re-implementation of the closed source commercial-only Secure Shell |SSH| protocol. OpenSSH provides secure encryption in order to protect data if intercepted during transmission. As explained by openssh.org, "OpenSSH encrypts all traffic |including passwords| to effectively eliminate eavesdropping, connection hijacking, and other attacks.” Linux distributions use the OpenSSH protocol and Windows systems use the proprietary SSH protocol. OpenSSH provides encryption to secure transactions in order to prevent intercepted messages from being read. The command to use OpenSSH in a Linux distribution is simply “ssh” and OpenSSH is commonly referred to as SSH in casual conversation. According the the Red Hat Enterprise Linux 6 Deployment Guide, "To ensure maximum security for your connection, it is recommended that only SSH version 2-compatible servers and clients are used whenever possible.” OpenSSH uses the library called OpenSSL and is explained by openssl.org as, “The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer |SSL v2/v3| and Transport Layer Security |TLS v1| protocols as well as a full-strength general purpose cryptography library.” Plain text protocols were originally developed when the concept of security was much different. Efficiency and ease of use is incorporated into the plain text protocols, but security was not of the same concern during the plain text protocol design era. Some examples of plain text protocols include File Transfer Protocol |FTP| and Telnet. Both of these protocols can be intercepted during network transfer. Wire sniffers such as WireShark or tshark can be used to view transactions that occurred in a way that is human readable. According to the Fedora Draft Documentation OpenSSH Guide, “When using a network connection, essential and complex communication protocols such as TCP |Transmission Control Protocol| and UDP |User Datagram Protocol| take place mostly "behind-the-scenes" and are hidden beneath the user interface.” This is where plain text protocols are exposed and encrypted protocols are protected. A SSH tunnel can be configured in order to encrypt traffic on a specific port. # ssh -N -L |port-number|:|remote-machine-ip|:|remote-machine-port| [email protected] Each user should have a .ssh directory in their home directory |~/.ssh|. A journal at linuxjournal.com explain that, “First, the client and the server exchange |public| host keys. If the client machine has never encountered a given public key before, both ssh and most web browsers ask the user whether to accept the untrusted key. Next, they use these to negotiate a session key that is used to encrypt all subsequent session data via a block cipher such as Triple-DES |3DES|, blowfish, or idea.” From the ~/.ssh location the following files are commonly used: id_rsa id_rsa.pub known_hosts The id_rsa file contains a users private key. You can use the cat command to read the file text and you will see that it is full of randomly generated characters. The private key for a user should not be shared with anyone else because if someone gets your private key then they can match it to the public key transmissions and read traffic encrypted with SSH intended for the other user. The id_rsa.pub key is the public key that is shared and used for public transmissions. The known_hosts file contains a list of host keys for all hosts that the user has logged into that are not already in the systemwide list of known host. Example OpenSSH Files for a Red Hat Enterprise Linux 6 system: The server package for allowing clients to connect to the system is openssh-server-* with the specific version number and architecture listed at the end. This package contains the SSH daemon which allows SSH clients to securely connect to the SSH server. The openssh-clients-* package includes the clients necessary to make encrypted connections to SSH servers. The libssh2-* package is a library implementing the SSH2 protocol. The openssh-* package includes the core files necessary for both the OpenSSH client and server. Heartbleed.
Views: 278 B. Totty
How to create a self signed certificate with openssl on ubuntu 17.04 zesty zapus
 
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OpenSSL is a general purpose cryptography library that provides an open source implementation of the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols. cd /etc/ssl/private openssl genrsa -aes128 -out server.key 2048 openssl rsa -in server.key -out server.key openssl req -new -days 3650 -key server.key -out server.csr openssl x509 -in server.csr -out server.crt -req -signkey server.key -days 3650 chmod 400 server.*
ShmooCon 2014: SafeCurves: Choosing Safe Curves for Elliptic-Curve Cryptography
 
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For more information visit: http://bit.ly/shmooc14 To download the video visit: http://bit.ly/shmooc14_down Playlist Shmoocon 2014: http://bit.ly/shmooc14_pl Speakers: Daniel J. Bernstein | Tanja Lange There are several different standards covering selection of curves for use in elliptic-curve cryptography (ECC). Each of these standards tries to ensure that the elliptic-curve discrete-logarithm problem (ECDLP) is difficult. ECDLP is the problem of finding an ECC user's secret key, given the user's public key. Unfortunately, there is a gap between ECDLP difficulty and ECC security. None of these standards do a good job of ensuring ECC security. There are many attacks that break real-world ECC without solving ECDLP. The core problem is that if you implement the standard curves, chances are you're doing it wrong: Your implementation produces incorrect results for some rare curve points. Your implementation leaks secret data when the input isn't a curve point. Your implementation leaks secret data through branch timing. Your implementation leaks secret data through cache timing. These problems are exploitable by real attackers, taking advantage of the gaps between ECDLP and real-world ECC. Secure implementations of the standard curves are theoretically possible but very hard. Most of these attacks would have been ruled out by better choices of curves that allow simple implementations to be secure implementations. This is the primary motivation for SafeCurves, http://safecurves.cr.yp.to/. The SafeCurves criteria are designed to ensure ECC security, not just ECDLP security.
Views: 1559 Christiaan008
Public Key, Private Key, Symmetric Cryptography and Asymetric Cryptography ISO 27001 Training
 
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Thanks For Watching This Video, I Hope You Must Have Liked It. If yes then please hit the subscribe button as I will be uploading a lot of IT security related training videos on this channel and if you will be my subscriber then you my friend will be the first one who will be notified about all my new videos my friend. If you have any questions for the topic that I have discussed in this video then please feel free to comment my friend and I will be happy to respond back to your queries... Please note that - all ISO 27001 documents and standards are completely owned intellectual property & copyright of ISO. So in case if by any chance you are interested to study more about the standard that I have discussed here then please go to the official ISO website in order to purchase the standards. This channel is only created to generate awareness and best practices for Information Security in general and if by any chance you wish to implement any of the standards that I have discussed here then you have to first purchase them from official ISO website. This channel is only created to help anyone who is currently studying or planning to study about ISMS Information Security Management System ISO 27001 Implementation. I want to make my contribution in the information security community.This channel is only created to generate awareness and best practices for Information Security in general. Disclaimer: Since ISO 27001 is a very vast topic and the implementation varies for all organization's so I can't ever call myself an "expert" in this field, all the knowledge and information that I am sharing here is only based upon my past experience in information security field and may not be directly applicable within your organization as such. So please use your judgement before implementing anything based upon my suggestions. I request you not to rely on anything that I say here, I do my best to be as accurate and as complete information that I can provide you “but” only the published standards are definitive. Only the published ISO standards stand above any information that I have shared in any of my videos. Thanks, Your IT Security Friend Luv Johar Website : http://aajkatech.com/ iso 27001 explained, iso 27001 awareness trainings, iso 27001 free trainings online, Iso 27001 free tutorials, ISO 27001 training material free, lead auditor free training course, lead implementer free training course, ISMS training free, information security management system training free,