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Recover RSA private key from public keys - rhme2 Key Server (crypto 200)
 
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Using the greatest common divisor (GCD) to factorize the public modulo into the secret primes, so we can forge a RSA signature. Source for the rhme2 challenges: https://github.com/Riscure/Rhme-2016 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/
Views: 34410 LiveOverflow
OpenSSH - Using RSA Public Keys for SSH Connection (ssh-keygen, ssh-copy-id, ssh- keyscan)
 
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Demo of connection via SSH using the RSA Public Keys without password using the commands 1) ssh-keygen - creates the public and private keys for connection 2) ssh-keyscan - putting the host into the trusted known_hosts files 3) ssh-copy-id - command to put public key in the authorized_keys file
Views: 21896 CodeCowboyOrg
2.4.1 RSA Public Key Encryption: Video
 
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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: 16185 MIT OpenCourseWare
NETWORK SECURITY - PUBLIC KEY DISTRIBUTION
 
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There are four ways to distribute the public keys among the users. 1) Public Announcement 2) Public Key Directory 3) Public Key Authority 4) Certificate Authority
Blockchain/Bitcoin for beginners 3: public/private keys, signatures... and first ever transaction
 
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Detailed overview of public/private key encryption and live demo of exactly how digital signatures work on Mac, combining public and private keys and hash functions. Welcome to episode 3 of my series on Blockchain/Bitcoin. I'm joined once again by my girlfriend Nadisha who is my classroom pupil... I build on the hash function concepts from the previous episode and explain the basic concepts public and private keys and how to use them to create digital signatures - a key part of the bitcoin infrastructure. We demonstrate in a Mac terminal how you can generate your own keys and encrypt and decrypt and sign your own resources - learning by doing always works. We touch on bitcoin addresses, what they represent and how they are created. Finally I go back for a refresh of the bitcoin blockchain browser and look at the first ever bitcoin transaction in the "Genesis Block" to show what a real bitcoin address looks like. Bitcoin Blockchain browser https://blockchain.info Online hash calculator - great way to practice and familiarise with hash functions - one of the most important building blocks of Blockchain/Bitcoin http://www.fileformat.info/tool/hash.htm Course to date (previous videos) 1. Blockchain introduction https://youtu.be/xwA2TkcAQgQ 2. Hashing, blockchain networks and look at blockchain browser https://youtu.be/oxwMnqFNq9M SAMPLE COMMANDS: You will need to use your own document - pick any document, obviously your hash values will be different to mine. Also I had to use (right arrow) - since comments do not allow "chevron" symbols # EXAMPLE 1: # generate public and private keys openssl genrsa -out mykey 2048; cp mykey privatekey; openssl rsa -in mykey -pubout -out publickey; rm mike #encrypt with public key echo “the cat sat on the mat” | openssl rsautl -encrypt -pubin -inkey publicly (right arrow) cipher.txt # show the garbage cat cipher.txt # decrypt with private key - The cat sat on the mat cat cipher.txt | openssl rsautl -decrypt -inkey privately # EXAMPLE 2: Sign Alice in wonderland #check the SHA256 hash of the document to send - d9db7b8984d808b2821070cc6cc76e4415229d3356452b2a0f06ec3608f13b6c shasum -a 256 alice-in-wonderland.txt | cut -d" " -f1 # create a text file called signature which hashes the document and encrypts with private key shasum -a 256 alice-in-wonderland.txt | cut -d" " -f1 | openssl rsautl -inkey privatekey -sign (right arrow) signature # wrap the signature up with the public key, the document and the signature and send it … we just copy to another folder tar -cvf alice.tar signature alice-in-wonderland.txt publickey;mkdir -p inbox;cp alice.tar inbox;cd inbox;tar -xvf alice.tar # inspect the public key and verify with the sender that it belongs to the sender cat publickey #decrypt the signature with the received public key - d9db7b8984d808b2821070cc6cc76e4415229d3356452b2a0f06ec3608f13b6c openssl rsautl -inkey publickey -pubin -in signature # hash the received document - d9db7b8984d808b2821070cc6cc76e4415229d3356452b2a0f06ec3608f13b6c shasum -a 256 alice-in-wonderland.txt | cut -d" " -f1 # if they are both the same then the document cannot have been changed since it was signed by the genuine owner of the # private key corresponding to the public key
Views: 18783 Matt Thomas
How To Encrypt And Decrypt Files Using Private Public Keys With OpenSSL On Ubuntu Linux
 
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How To Encrypt And Decrypt Files Using Private Public Keys With OpenSSL On Ubuntu Linux. This video tutorial will show you how to use the openssl command line to encrypt and decrypt a file using a public key. We will first generate a private key then extract the public key from this private key. last we will encrypt a file using the public key and later use the corresponding private key to decrypt it. 🌸 Support channel & make donation : https://www.paypal.me/aminenina/5 🌸 Subscribe for more videos : Youtube: https://www.youtube.com/user/aminosninatos 🌸 Follow me On Social Media Facebook : https://www.facebook.com/aminosninatos/ *********************************************************************** 🌸 How To Convert Public Private Putty's ppk Keys To OpenSSH Keys On Ubuntu Linux https://youtu.be/3aApOFQL44o 🌸 How To Use GPG Private Public Keys To Encrypt And Encrypt Files On Ubuntu Linux https://youtu.be/I-4dcpTDWys 🌸 How To Encrypt And Decrypt Files Using Private Public Keys With OpenSSL On Ubuntu Linux https://youtu.be/g9XN1-bANKU 🌸 How To Encrypt And Decrypt Files Using OpenSSL On Ubuntu Linux https://youtu.be/YU1AI62khIY 🌸 How To Use MD5SUM To Verify Data Integrity On Ubuntu Linux https://youtu.be/V1fgjXRFB2k 🌸 How To Generate Random Password From The Command Line On Ubuntu Linux https://youtu.be/TQ4QMJWVd8U 🌸 Linux How To Crack And Recover A Password Protected Zip File https://youtu.be/C9a6BPxUN_4 🌸 Password cracking with John the Ripper on Linux https://youtu.be/KK2bNgX1mRA 🌸 Linux : HowTo Encrypt And Decrypt Files With A Password using GPG https://youtu.be/a91v1bz_ZU4 🌸 How To Secure Copy Files In Linux Using SCP Command https://youtu.be/3Y8pVDhc3RQ 🌸 How To Sync And Backup Files In Linux Using Rsync Command https://youtu.be/aIMbg7vG6Rg ***********************************************************************
Views: 930 Amine Nina
Delphi - RSA-1024 Encryption
 
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Delphi - RSA-1024 Encryption In this episode, we will be showing you how you can generate and use RSA 1024 Keys in Delphi to encrypt text with a public key and decrypt your text with the private key. Blog / Source code Download http://jugoo.co.uk/2018/03/delphi-rsa-1024-encryption-example-video-lockbox3/ So we will start off with a pre-made RSA unit and the Rad studios Delphi add-on LockBox3, This will be a great example for beginners and hobbyist coders from all ages from kids to adults, with the simplified pre-made units the easy to use function can be understood by anyone.
Cisco ASA version 9 How to generate encryption RSA keys
 
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Author, teacher, and talk show host Robert McMillen shows you how to use the Cisco ASA version 9 generate RSA keys command
Views: 2548 Robert McMillen
Configure SSH Server for Private Key Authentication in Ubuntu -Part1
 
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A tutorial on configuring SSH Server to Authenticate with Private/Public Keys using Ubuntu Linux http://www.danscourses.com/Linux-Fundamentals/how-to-install-ssh-in-ubuntu-388.html
Views: 92334 danscourses
Python Encryption Tutorial with PyCrypto
 
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Sentdex.com Facebook.com/sentdex Twitter.com/sentdex How to use python to encrypt sensitive information, and later decrypt it, using PyCrypto! PyCrypto: https://www.dlitz.net/software/pycrypto/ The Code: http://sentdex.com/sentiment-analysisbig-data-and-python-tutorials/encryption-and-decryption-in-python-code-example-with-explanation/
Views: 79322 sentdex
Python Advanced Tutorial 10 - PyCrypto
 
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This is a tutorial on PyCrypto, looking at encrypting and decrypting files using AES-256. All Links and Slides will be in the description. Subscribe for more cool stuff! Block Cipher Modes - http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation Slides & files - https://www.mediafire.com/folder/b4om18885dp0k/Tutorial_10_-_PyCrypto Python - http://python.org/ Ubuntu - http://www.ubuntu.com/ DrapsTV Twitter - https://twitter.com/DrapsTV If you like what you see be sure to subscribe and thumbs up!
Views: 43897 DrapsTV
Finding a Private Key with Heartbleed
 
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This trivial script finds a lot of the private key from the CloudFlare Challenge server in 100 requests, in just a few seconds. HOWEVER, I think we are not finding the original key used by nginx, but the RAM used to collect the winning entry, so this does not prove the point. Only the first winner did that. Thanks to Kevin, a CCSF student, for sending me his partial solution which showed me how easy this is. More information here: http://samsclass.info/124/proj14/heartbleed.htm
Views: 8722 Sam Bowne
Retrieving the Private key and Certificate from a PFX
 
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1) Download and Install Open SSL : https://code.google.com/p/openssl-for-windows/downloads/list 2) Open CMD 3) Navigate to Open SSL-Win32\Bin Directory ------------------Retrieving the Private KEY------------------ 4) openssl pkcs12 -in thePFXfile.pfx -nocerts -out privatekey.pem -nodes ------------------Retrieving the Certificate------------------ 5) openssl pkcs12 -in thePFXfile.pfx -nokeys -out certificate.crt 6)Both the Certificate and the Privatekey Can be found in the Bin Directory of OpenSSL Cheers.
Views: 13009 Sysadmin-Basics
Private Key Tutorial 01
 
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I made this video to show people how to retrieve a balance from a lost,damaged, or stolen device with a Jaxx wallet on it and send to a new address.
Views: 3974 Steven Kiley
SSH Public/Private Key Setup
 
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This video is a simple visual guide for how to generate an RSA key pair and configure UltraEdit to use it to authenticate with your FTP server. Doing so can make your connection more secure, and, should you choose not to use a passphrase, more convenient. We'll SSH into the server, generate the public and private keys, copy the private key to our local machine and the corresponding public key to the authorized_keys directory. Then we'll tell UltraEdit where we put the private key. **NOTE** In this video, we connect directly as root on a temporary server. If you're new to *nix system administration, know that it's best practice to disable root's ability to connect directly and instead allow other users who need to sudo to do so. **NOTE** **NOTE** If you choose to set up your key pair with a pass phrase, UltraEdit will prompt you for it every time you connect, just as though you were authenticating from a command line. A passphrase and SSH key pair increase security significantly. **NOTE** IDM Computer Solutions https://www.ultraedit.com UltraEdit - UEStudio - UltraCompare - UltraFinder - UltraFTP
Views: 2692 UltraEdit
Private/Public Key SSH in Windows using freeSSHd and PuTTYgen - 5/5
 
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A tutorial on private-public key authentication in Windows using freeSSHd, PuTTY, and PuTTYgen. 5/5 in a series on SSH and key pair authentication http://www.danscourses.com/
Views: 73156 danscourses
Using GPG
 
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Summary Many more examples of GPG usage. 7:09 - Generating a GPG key pair 16:24 - Creating a revocation certificate 18:05 - Outputting revocation certificate to a file 20:01 - Exporting public key (binary file) 20:26 - Using xxd hex viewer to view binary file 21:14 - Exporting public key (ASCII file) 28:09 - Importing a public key 28:51 - Checking fingerprint of public key Reference Materials http://www.gnupg.org/documentation/index.en.html - GnuPG Documentation
SSL Private Key Read from PFX File IIS Extract And View
 
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Download and install OPEN SSL : http://www.gc14.com/hcon/downloads/openssl-0.9.8h-1-setup.rar Open Command Prompt - as Administrator Change directory to where you installed OPENSSL Sub-Directory is : BIN Example : CD C:\Program Files (x86) \GnuWin32\bin Type : openssl to activate OPENSSL Prompt At the OPENSSP Prompt: Enter : pkcs12 -in [YourPFXFile.pfx] -nocerts -out privatekey.pem -nodes Example : pkcs12 -in mail_YourDomain_com.pfx -nocerts -out privatekey.pem -nodes
Views: 2450 F-ZERO
NodeJs - Symmetric Encryption (Module Crypto)
 
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Learn to Encrypt and Decrypt Text With NodeJS using Module "Crypto". Easy and simple to use and very helpful in cases when you want to store information in database in encrypted form.
Views: 5443 Aman Kharbanda
SSH Public Key Authentication on Cisco IOS
 
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https://nwl.cl/2wRI9o4 - This lesson explains how to configure SSH Public Key Authentication on Cisco IOS using Windows and Linux.
Views: 1540 Networklessons.com
How to Encrypt & Decrypt Files or Folders Using Command Prompt
 
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Get certified after completion on of Certificate Authority (ADCS) Server 2016 Course: https://www.udemy.com/complete-certificate-authority-adcs-server-2016-course/ Learn more: http://vincenttechblog.com
Views: 51042 Vincent's Tech Blog
SFTP - How to Import an OpenSSH Private Key into WinSCP
 
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WinSCP Download - https://winscp.net/eng/download.php Demo how to import an OpenSSH formatted Private and Public Key Pair into WinSCP for use with SSH and SFTP
Views: 7767 CodeCowboyOrg
SFTP - Use WinSCP to Login to SFTP without Password using Public Key Private Key Pair
 
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WinSCP Download - https://winscp.net/eng/download.php Demo how to import an OpenSSH formatted Private and Public Key Pair into WinSCP for use with SSH and SFTP
Views: 44231 CodeCowboyOrg
How to Use Putty with SSH Keys on Windows
 
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In this tutorial, we will demonstrate how to use PuTTY with SSH keys in windows. Don't forget to check out our site http://howtech.tv/ for more free how-to videos! http://youtube.com/ithowtovids - our feed http://www.facebook.com/howtechtv - join us on facebook https://plus.google.com/103440382717658277879 - our group in Google+ In this easy step by step tutorial, you will learn how to use PuTTY as an SSH client in Windows. PuTTY is communication software available freely over the internet, which uses several network protocols including SSH. Logging in using PuTTY SSH keys allows the only those people who have a valid key pair, which further prevents any threat of unwanted hacking of data. Step#1: Configuring PuTTY terminal First of all, open up the PuTTY terminal. Over here, enter the host for the server which you want to connect to. Let's enter an IP address of one of the host here and leave the port to default. Step#2: Authorization With that done, let's move to the SSH option in the category portion, expand it and then click on the "Authorization" option. Here, browse for the Key File which will be automatically made when configuring this connection. Locate the file and then click on the OK button. Step#3: Connecting to SSH Server Once you are done with that, a terminal will open up and will prompt you for the username. Specify the username and hit enter. After that, the connection would be established completely, enabling you to perform any tasks depending upon the permissions set by the administrator. Step#4: Generate SSH Key Now let's see how we can generate the SSH keys. For that, open up the Putty key generator. Over here, click on the Generate button next to the "Generate a public/private Key pair" option, in the Actions section. Step#5: Encrypting and saving SSH Key You can also change the type of parameters according to your requirements, and even change the bits over here. When prompted to generate some randomness, keep moving the cursor over the blank screen over here. This step is basically used by the application for securing the encryption. Random movements can be hard to re-generate and the sequence produced by your movements is calculated by the application. Once the process completes, it will show you the encryption key in the preview area. To save this key, click on the Save Private Key button and it will prompt you with a notification asking you whether you want to create a key without a passphrase. Hit yes to ignore it for now and then specify the location for the file. Your PuTTY SSH key file would be saved with the ".ppk" extension. And that pretty much covers the basics of using PuTTY with SSH keys in windows.
How do I find my SSH Public Key?
 
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SSH public key. Find my public key. Generate a public key on mac. Look up my ssh public key for github. Find public key on mac.
Views: 18277 Eric Cavazos
assymetric encryption lab using public and private key
 
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Please watch: "IPv6 and Multiuser Lab showing wan connection using cisco packet tracer" https://www.youtube.com/watch?v=qq9r_A94lh4 -~-~~-~~~-~~-~- Learn to encrypt and decrypt files using public and private key. In this tutorial you will learn following things: 1.how to create private key in linux using openssl. 2.how to create public key using private key. 3.how to encrypt a file using public key 4.how to decrypt a file using private key. This tutorial demonstrate the complete example of asymmetric encryption technology.
Views: 564 slashrootdotin
Module 5: Encryption and Decryption with OpenSSL
 
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This video details how to encrypt and decrypt using OpenSSL. References: Farid's Blog. (n.d.). Retrieved March 1, 2015, from http://farid.hajji.name/blog/2009/07/15/encryption-and-decryption-with-openssl/
Views: 5016 Simple Security
Web based private key authentication in php
 
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A web based method to register and authenticate user using public/private keys. Technical details http://stackoverflow.com/a/25229985/1794248 Source code https://github.com/moldcraft/doer
Views: 2446 Experimental
Encryption and decryption with openssl
 
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This is a tutorial showing how to use OpenSSL in linux systems (Kali in the video) for symmetric and assymetric encription and decription.
Views: 6380 NetSec
What are certificates?
 
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Certificates are used to prove identity and used for creating secure communication. Check out http://itfreetraining.com for more of our always free training videos. This video looks at how a certificate works, what is a certificate and how they are used for identification and secure communication. Download the PDF handout http://itfreetraining.com/Handouts/Certificates/WhatAreCertificates.pdf What is a certificate? A certificate is an electronic document that contains data fields. When compared to a traditional paper certificate there are some similarities between an electronic certificate and a physical certificate. Digital certificates like a physical certificate are issued by an authority. For example, a university may issue a certificate to a student to show that they have completed the necessary work in order to graduate. The next question is, would you trust a physically certificate? Digital certificates work the same way. They are issued from an authority and the question becomes would you trust the authority that issued the certificate? Electronic certificates also contain other fields like who or what the certificate was issued to, how long it is valid, the public key and the digital signature. If a digital certificate is presented to a user or computer, the user or computer is able to check the certificate to ensure the person using it should be using it. Also the certificate contains a digital signature which allows the certificate to be checked to make sure it has not been modified. Digital Signature A digital signature provides a method for a certificate to be checked to ensure it has not been modified. In order to do this, a hash value is created for the certificate. To generate a hash value the certificate is put through a function to create a single value. Hash functions are designed so different certificates will not produce the same value, however the hash value cannot be used to generate the original certificate. The same principal applies to a person's fingerprints. They can be used to identify a person, however using a finger print you could not work out the features of a person like what color hair they have. When a certificate is created, the hash value for that certificate is also created. Using a function involving the private key, a digital signature is created and added to the certificate. Digital Signature Example When a certificate is used, in order to check the certificate has not been changed, the following is done: The computer generates the hash value for the certificate. Next, the digital signature is put through a function using the public key which should result in the same hash value. If both values match, the certificate has not been modified. This prevents a 3rd party taking a certificate, changing the values in the certificate and using the certificate. Trust Model Certificates work off a trust model. An example of a trust model in computers is that a computer may have a sticker on it indicating which operating systems it will run. The consumer, seeing this sticker, must trust that the manufacture would not put this sticker on the laptop unless it will run that operating system. The customer must also trust the creator of that operating system would not allow a computer manufacturer to put a sticker on a computer that would not run that operating system. Certificate Trust Model Certificates are generally deployed in a hierarchy. At the top is the root certificate authority. This can be an internal Certificate Authority or an external authority like VeriSign. When an authority like VeriSign issues a certificate, they will perform a number of checks on the individual purchasing the certificate to ensure that they are a valid business. When a certificate is used it can be checked to see which authority issued that certificate. In order for the certificate to be used, the computer must trust the authority that it was issued from. Authorities like VeriSign are trusted by default on most operating systems. Certificate Error If a certificate is presented to the computer and it is not trusted, the computer will generate an error asking if the users want to trust the certificate. It is up to the user to decide if they believe the certificate is valid. Certificate Hierarchy Certificates use a hierarchy. At the top is the root CA, below these are subordinate CA's. Any level can issue certificates to subordinate CA's or direct to users, computers or devices. If the user, computer or device trusts the root CA, then any certificate that is issued by any CA in the hierarchy will automatically be trusted and thus used by the client. References "MCTS 70-640 Configuring Windows Server 2008 Active Directory Second edition" pg 771-775 "Public key certificate" http://en.wikipedia.org/wiki/Public_key_certificate
Views: 397718 itfreetraining
How to use ssh private keys in FileZilla for SFTP password-less connections.
 
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Showing the way how to use ssh private keys in FileZilla for SFTP password-less connections. It's aimed to use this feature for Windows oriented users.
Views: 68126 Petr Ruzicka
How SSL works tutorial - with HTTPS example
 
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How SSL works by leadingcoder. This is a full tutorial how to setup SSL that requires client certificate for reference: http://www.windowsecurity.com/articles/Client-Certificate-Authentication-IIS6.html .
Views: 1344300 tubewar
SSH Without Authentication Using Key Files (CentOS 5.6)
 
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A quick tutorial on how to ssh into a server without using authentication key files instead of a password.
Views: 14101 Joseph Palumbo
How do I remove CryptoWall virus and get my files back without pay for CryptoWall decrypter
 
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(CryptoWall removal guide) What is CryptoWall? How to decrypt encrypted files? CryptoWall is a new variant of the ransomware CryptoLocker virus. Crypto Wall is for the most part the same as CryptoDefense, CryptorBit and Cryptolocker other than the name change and different filenames for the ransom instructions. When Crypto Wall is installed it will scan your computer for data files and encrypt them. When CryptoWall is installed it will scan your computer for data files and encrypt them. It will then create files containing ransom instructions in every folder that it had encrypted a file. These ransom notes are DECRYPT_INSTRUCTION.HTML, DECRYPT_INSTRUCTION.TXT, and the DECRYPT_INSTRUCTION URL shortcut to the decryption service. DECRYPT_INSTRUCTION: What happened to your files ? All of your files were protected by a strong encryption with RSA-2048 using CryptoWall. More information about the encryption keys using RSA-2048 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem) What does this mean ? This means that the structure and data within your files have been irrevocably changed, you will not be able to work with them, read them or see them, it is the same thing as losing them forever, but with our help, you can restore them. How did this happen ? Especially for you, on our server was generated the secret key pair RSA-2048 - public and private. All your files were encrypted with the public key, which has been transferred to your computer via the Internet. Decrypting of your files is only possible with the help of the private key and decrypt program, which is on our secret server. What do I do ? Alas, if you do not take the necessary measures for the specified time then the conditions for obtaining the private key will be changed. If you really value your data, then we suggest you do not waste valuable time searching for other solutions because they do not exist. ... Message presented in the CryptoWall ransom payment page: You did not pay in time for decryption, that's why the decryption price increases 2 times. At the moment, the cost of decrypting your files is 1000 USD/EUR. In case of failure to 04/06/14 - 11:36 your key will be deleted permanently and it will be impossible to decrypt your files. ... CryptoWall virus removal: Reboot your computer into Safe Mode. Delete the related file. How do I get my files back(decrypt) without pay for CryptoWall decrypter? Use Previous Versions to restore your files. Watch More virus removal videos at:https://www.youtube.com/user/MrRemoveVirus
Views: 516096 Mr. RemoveVirus
How To Encrypt And Decrypt Files Using OpenSSL On Ubuntu Linux
 
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How To Encrypt And Decrypt Files Using OpenSSL On Ubuntu Linux OpenSSL is a program and library that supports many different cryptographic operations, including: Symmetric key encryption Public/private key pair generation Public key encryption Hash functions Certificate creation Digital signatures Random number generation The most common cryptographic operation is encryption. Lets encrypt some files using selected symmetric key (conventional) ciphers such as DES, 3DES and AES. 🌸 Support channel & make donation : https://www.paypal.me/aminenina/5 🌸 Subscribe for more videos : Youtube: https://www.youtube.com/user/aminosninatos 🌸 Follow me On Social Media Facebook : https://www.facebook.com/aminosninatos/ *********************************************************************** 🌸 How To Convert Public Private Putty's ppk Keys To OpenSSH Keys On Ubuntu Linux https://youtu.be/3aApOFQL44o 🌸 How To Use GPG Private Public Keys To Encrypt And Encrypt Files On Ubuntu Linux https://youtu.be/I-4dcpTDWys 🌸 How To Encrypt And Decrypt Files Using Private Public Keys With OpenSSL On Ubuntu Linux https://youtu.be/g9XN1-bANKU 🌸 How To Encrypt And Decrypt Files Using OpenSSL On Ubuntu Linux https://youtu.be/YU1AI62khIY 🌸 How To Use MD5SUM To Verify Data Integrity On Ubuntu Linux https://youtu.be/V1fgjXRFB2k 🌸 How To Generate Random Password From The Command Line On Ubuntu Linux https://youtu.be/TQ4QMJWVd8U 🌸 Linux How To Crack And Recover A Password Protected Zip File https://youtu.be/C9a6BPxUN_4 🌸 Password cracking with John the Ripper on Linux https://youtu.be/KK2bNgX1mRA 🌸 Linux : HowTo Encrypt And Decrypt Files With A Password using GPG https://youtu.be/a91v1bz_ZU4 🌸 How To Secure Copy Files In Linux Using SCP Command https://youtu.be/3Y8pVDhc3RQ 🌸 How To Sync And Backup Files In Linux Using Rsync Command https://youtu.be/aIMbg7vG6Rg ***********************************************************************
Views: 402 Amine Nina
633 PKI Assignment help (Crypto Lab – Public-Key Cryptography and PKI)
 
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Extract public key for verification: http://stackoverflow.com/questions/10271197/openssl-how-to-extract-public-key Verify sign : https://raymii.org/s/tutorials/Sign_and_verify_text_files_to_public_keys_via_the_OpenSSL_Command_Line.html Encrpytion : http://askubuntu.com/questions/60712/how-do-i-quickly-encrypt-a-file-with-aes Measure time ; http://askubuntu.com/questions/53444/how-can-i-measure-the-execution-time-of-a-terminal-process Cpp files : (openssl sample code) http://www.cis.syr.edu/~wedu/seed/Labs_12.04/Crypto/Crypto_PublicKey/
Views: 2755 Jae duk Seo
How To Create Private and Public Keys Using GPG4win
 
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This tutorial will show you how to create your private and public keys in GPG4win. For more tutorials, visit http://www.interpayroll.co.uk/blog
Views: 40199 interpayroll
How to Change Amazon Web Services EC2 Key Pair
 
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What do you do when you lose your Amazon Web Services AWS EC2 Key Pair? AWS EC2 only allows you to download EC2 Key Pairs once, and that's that. But there's a neat trick to getting back access to your AWS EC2 instance. Moba Xterm: http://mobaxterm.mobatek.net/download.html Amazon Web Services site: http://aws.amazon.com/ Commands that I use in the tutorial: cd C:/ cd Users/huyle/Downloads ls -lah chmod 600 personal-website.pem chown :Users personal-website.pem ssh -i personal-website.pem [email protected] sudo fdisk -l sudo mount /dev/xvdf1 /mnt cp ~/.ssh/authorized_keys /mnt/home/ubuntu/.ssh/authorized_keys sudo umount /mnt Twitter: https://twitter.com/microwavesam Blog: http://slothparadise.com Consider supporting our group in making stuff: ►https://www.patreon.com/slothparadise ►Twitter: https://twitter.com/slothparadise
Views: 24025 MicrowaveSam
Make your own public private key file encryptor in visual basic.
 
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A visual basic project that makes a file encryptor to send files to your friends that no one but your friend can read. It uses the public private key method. Only a user with a private key can read anything encrypted with his public key. The goal here is to help make it easier to understand how to use public and private keys when encrypting files and the importance of privacy. The method of encryption is technically called asymmetric encryption, but also called public key cryptography. In the video there is also a quick example of how to show attribution properly when using freely available resources. There is an image used available under a creative commons license. The programming code and exe program are available here: h ttps://sites.google.com/site/programmingcodeexamples https://sites.google.com/site/programmingcodeexamples
Views: 91 Bob King
SSH - Generate SSH key pair on Windows
 
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Make sure to watch with Subtitles/CC turned ON. In this example, I am creating a key pair using RSA (Rivest-Shamir-Adleman) cryptosystem. Executing this command will provide you with a private key, which you should keep in your ".ssh" directory or on your USB, and with a public key, which, for example, you should add to your GitHub/BitBucket/GitLab account, or to your Linux VMs ".ssh/authorized_keys" file.
Views: 535 Goran Vasić
PGP Encryption Tutorial (using gpg4win and Kleopatra)
 
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A short tutorial on how to use Kleopatra and gpg4win to encrypt messages using public PGP keys. Download gpg4win and Kleopatra here: http://www.gpg4win.org/ ** Also, an easier way instead of saving the persons public key as a GPG. Just have is saved to your clipboard and click on the system tray and click 'Certificate Import' and it does it all it's self :) (Harvey Crumpet)
Views: 176192 Kevin Cronly
Blockchain tutorial 15: Convert public, private key pairs to addresses
 
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This is part 15 of the Blockchain tutorial explaining why some Blockchain implementations convert public, private key pairs to addresses. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. 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: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 5356 Mobilefish.com
SSH - Copy public key to remote server
 
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Make sure to watch with Subtitles/CC turned ON. Generate key pair: $ ssh-keygen -t rsa -b 4096 -f ~/.ssh/yourkey -C "[email protected]" Copy key: $ ssh-copy-id -i /path/to/your-private-key [email protected] SSH using your private key: $ ssh -i /path/to/your-private-key [email protected] If you create the key pair under a directory other than "~/.ssh/", then you can specify its location using the SSH config file. You can see how to do that in my previous SSH Basics video.
Views: 293 Goran Vasić
GPG4Win Lesson 2 Creating Your Key & Export
 
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In this lesson we create our first public/private keypair using GPG4Win and Kleopatra. This tutorial is mostly the "how" and thus very light on theory. Please check out some public/private key crypto how-tos or videos for the "why". Stay tuned for the other lessons!
Views: 1512 Timothy Harding
SSH   Generate SSH key pair on Linux
 
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Make sure to watch with Subtitles/CC turned ON. In this example, I am creating a key pair using RSA (Rivest-Shamir-Adleman) cryptosystem on Linux CentOS 7. Executing this command will provide you with a private key, which you should keep in your ".ssh" directory or on your USB, and with a public key, which, for example, you should add to your GitHub/BitBucket/GitLab account, or to your Linux VMs ".ssh/authorized_keys" file.
Views: 88 Goran Vasić
How to Remove ".Locky" ransomware (Cryptosystem virus removal guide)
 
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Locky virus is a new ransomware that encrypts your data using AES encryption and then ransom 0.5 BTC (approximately US$210) bitcoins to pay for Locky Decryptor™ to decrypt your files. Locky virus is currently being distributed via email that contains Word document attachments with malicious macros. The email message will contain a subject similar to ATTN: Invoice J-98223146 and a message such as "Please see the attached invoice (Microsoft Word Document) and remit payment according to the terms listed at the bottom of the invoice". Once Locky virus is infect your PC, Locky will then scan all local drives and unmapped network shares for data files to encrypt. It appends the .locked extension to the encrypted files. It makes sure you see the following message by changing your desktop wallpaper: !!! IMPORTANT INFORMATION !!!! All of your files are encrypted with RSA-2048 and AES-128 ciphers. More information about the RSA and AES can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem) http://en.wikipedia.org/wiki/Advanced_Encryption_Standard Decrypting of your files is only possible with the private key and decrypt program, which is on our secret server. To receive your private key follow one of the links: 1. http://i3ezlvkoi7fwyood.tor2web.org/34535A980... 2. http://i3ezlvkoi7fwyood.onion.to/34535A98023C... 3. http://i3ezlvkoi7fwyood.onion.cab/34535A98023... If all of this addresses are not available, follow these steps: 1. Download and install Tor Browser: https://www.torproject.org/download/download-easy.html 2. After a successful installation, run the browser and wait for initialization. 3. Type in the address bar: i3ezlvkoi7fwyood.onion/34535A9802... 4. Follow the instructions on the site. !!! Your personal identification ID: 34535A98023C9... !!! On the Windows desktop and in each folder where a file was encrypted, Locky will create ransom notes called _Locky_recover_instructions.txt. _Locky_recover_instructions.bmp How to remove Locky Cryptor virus? Removal guide: Remove Locky related Files: %UserpProfile%\Desktop\_Locky_recover_instructions.bmp %UserpProfile%\Desktop\_Locky_recover_instructions.txt %Temp%\random.exe How to get my files back after infected Locky Crypto virus? Unfortunately, at this time, there is no known way to decrypt files encrypted by Locky. What do I do? How to avoid infect Locky Crypter Ransomware 1.Backup regularly and keep a recent backup copy off-site. 2.Don’t enable macros in document attachments received via email. 3.Be cautious about unsolicited attachments.
Views: 59103 Mr. RemoveVirus
Java prog#129. How to encrypt and decrypt data in Java Part 1
 
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Views: 94546 ProgrammingKnowledge
GPG4Win Lesson 3 Importing a Public Key and Encrypting a File
 
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In Lesson 3 we use the computer as Jane. We first import the public that Tim exported in lesson 2. Then we verify the key, trust it, and proceed to use it to encrypt Jane's secret document so that only Tim can read it. This tutorial is mostly the "how" and thus very light on theory. Please check out some public/private key crypto how-tos or videos for the "why". Stay tuned for the other lessons!
Views: 2634 Timothy Harding

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