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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 -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF #Cryptography
Views: 42163 LiveOverflow
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
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: 26250 CodeCowboyOrg
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: 480196 itfreetraining
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: 2027 Liv4IT
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: 19924 Matt Thomas
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: 517278 Mr. RemoveVirus
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: 18662 MIT OpenCourseWare
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: 3018 F-ZERO
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: 3284 Jae duk Seo
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: 9748 NetSec
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: 3007 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: 96657 danscourses
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: 2727 Experimental
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: 70702 Vincent's Tech Blog
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: 4119 Steven Kiley
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: 70083 Petr Ruzicka
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
Views: 2935 UltraEdit
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: 14855 Sysadmin-Basics
RSA Algorithm & C++ | 2019
 
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RSA is an algorithm used by modern computers to encrypt and decrypt messages. Modern ecnryption is mostly based on this algorithm. It is an asymmetric cryptographic algorithm. Asymmetric means that there are two different keys. This is also called public key cryptography, because one of the keys can be given to anyone. The other key must be kept private. The algorithm is based on the fact that finding the factors of a large composite number is difficult: when the integers are prime numbers, the problem is called prime factorization. It is also a key pair (public and private key) generator. Website - http://dprogrammer.org Patreon - https://www.patreon.com/dani2442 Gmail - [email protected] Social Media: Facebook - https://www.facebook.com/dprogrammerlopez Twitter - https://twitter.com/DprogrammerL YouTube - https://www.youtube.com/channel/UCGtQKaX0CCefmNkCfpBGw_A LinkedIn - https://www.linkedin.com/in/daniel-lopez-0a5098173/ Pinterest - https://www.pinterest.es/daniellm2442123 Google+ - https://plus.google.com/u/0/106892447370946095732
Views: 117 dProgrammer lopez
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.
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: 2415 Networklessons.com
JSCS Server public/private key-pair generation
 
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JSCS - Javacard-based Secret Communication System [Demonstration] Generate RSA public/private key-pair for the server Store the key-pair on server Javacard, server config file Store the public key for user registration
Views: 441 hkucsJSCS
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: 53261 CodeCowboyOrg
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: 10298 CodeCowboyOrg
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: 46985 DrapsTV
Manually Remove "Your personal files are encrypted" by  Cryptowall/Cryptorbit/Cryptolocker & others
 
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Remove Cryptorbit, Cryptolocker, Cryptowall & others manually. No software required. I show you how to remove Cryptorbit but its the same exact steps to remove Cryptolocker as well as other similar infections. Follow me step by step. Pause this video if you need to. We will go into the registry but i will go slowly so pay attention. -First thing to do is go into you control panel and uninstall anything to do with Crypt. Some of you will have something in there, others will not. -Next we restart computer into "safe mode". Once your your computer starts to reboot back up, keep pressing the F8 key to get it in safe mode. Once there highlight and click "safe mode". -Once your computer is booted up and in safe mode click on the start button and type in "regedit" - Now, follow this exact path.. Hkey_current_User--software--microsoft--windows--current version--run- now look for Cryptorbit, right click it and press delete. And click yes to the prompt asking if you are sure you want to delete it. - Now click on the Start menu then click on "Administrator", then Appdata--Roaming-- then find and delete Cryptorbit. - Restart your computer as normal. And there you go. Congrats to you, you just did actually what these free programs will do except for adding additional malware on your computer. Please sub and Like if this worked for you. Thank you! Cyyptorbit Your personal files are encrypted. All files including videos, photos and documents, etc. on computer are encrypted. Encryption was produced using a unique public key generated for this computer. To decrypt files, you need to obtain the private key. The single copy of the private key, which will allow you to decrypt the files, located on a secret server on the Internet; the server will destroy the key after a time specified in this windows. After that, nobody and never will be to restore files. File decryption cost ~ $50. (some will say $200) In order to decrypt the files, open site 4sfxctgp53imlvzk.onion.to/index.php and follow the instruction. If 4sfxctgp53imlvzk.onion.to is not opening, please following steps below: 1. You must download and install this browser: http://www.torproject.org/projects/torbrowser.html.en 2. After installation, run the browser and enter the address: 4sfxctgp53imlvzk.onion.to/index.php 3. Follow the instructions on the web-site. We remind you that the sooner you do, the more changes are left to recover the files. Guaranteed recovery is provided within 10 days. http://barnegat-manahawkin.patch.com/groups/police-and-fire/p/prosecutor-warns-of-latest-home-computer-virus Prosecutor Warn of Latest Computer Virus
Views: 207382 iLuvTrading
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: 895 Goran Vasić
How to Encrypt and Decrypt using Openssl on windows
 
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This is an educational video showing how to encrypt and decrypt data using openssl on windows
Views: 7041 salim awadhi
DEF CON 26 - Romailler and Amiet - Reaping and Breaking Keys at Scale When Crypto Meets Big Data
 
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Public keys are everywhere, after all, they are public. These keys are waiting to be reaped by those who know their real value. Hidden behind this public face lurks some potentially dangerous issues which could lead to a compromise of data and privacy. Leveraging hundreds of minion devices, we built a public key reaping machine (which we are open sourcing) and operated it on a global scale. Collected keys are tested for vulnerabilities such as the recent ROCA vulnerability or factorization using batch-GCD. We've collected over 300 million keys so far and built a database 4 to 10 times bigger than previous public works. Performing the initial computation on over 300 million keys took about 10 days on a 280 vCPU cluster. Many optimizations allow our tool to incrementally test new RSA keys for common prime factors against the whole dataset in just a few minutes. As a result of our research, we could have impersonated hundreds of people by breaking their PGP keys, mimicked thousands of servers thanks to their factored SSH keys and performed MitM attacks on over 200k websites relying on vulnerable X509 certificates. In the end, we were able to do this in an entirely passive way. Going further is possible, but it would lead us to the dark side. Would big brother hesitate to go there?
Views: 775 DEFCONConference
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: 85523 sentdex
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: 6723 Aman Kharbanda
How to Decrypt the Encrypted Files and Folders in Windows 10
 
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By using this method you can decrypt the files and folders for windows 10. Encrypted files and folders are meant to protect any intrusion or unwanted access for other users on your system. If you want to learn how to Encrypt the files and folders, then visit the following URL : https://www.youtube.com/watch?v=uF_ewHntpeg Once your files and folders are encrypted then no other user than you, can access them. Again in order to decrypt them you can use the method used in this tutorial. If you like the video, keep sharing it and post your valuable comments in the below comment box. Thank You :)
Views: 80550 Techno Math
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: 1411399 tubewar
Complete RSA Algorithm in C++
 
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I implemented complete RSA Algorithm in C++. You can download source sample code free of charge. Please leave your comments and questions. I will try to write you back asap. Download sample source code: http://www.talkplayfun.com/bison_flex/tpf_math_library.zip For more information about Cryptography: http://www.talkplayfun.com/Cryptography/
Views: 2198 Kim Thomas
Configure SSH Server for Private Key Authentication in Ubuntu - 2/5
 
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A tutorial on configuring SSH Server to Authenticate with Private/Public Keys using Ubuntu Linux. 2/5 in a series on SSH and key pair authentication http://www.danscourses.com/Linux-Fundamentals/how-to-install-ssh-in-ubuntu-388.html
Views: 35160 danscourses
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: 1097 Goran Vasić
Private Key and CSR generation using the Terminal
 
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Private Key and CSR generation using the Terminal: 1. Open the Terminal 2. Generate a private key using following command: openssl genrsa -out private.key 2048 3. Generate CSR using following command: openssl req -new -key private.key -out your_domain.csr -sha256 4. Enter the required data using English keyboard: Country Name (2 letter code), State or Province Name (full name) [Some-State], Locality Name (eg, city) [],Organization Name (eg, company) [Internet Widgits Pty Ltd], Common Name (e.g. server FQDN or YOUR name) [], Email Address [] 5. Private Key and CSR were generated and saved in your user folder 6. IMPORTANT: Save the private.key and your_domain.csr in a safe place. Repeating the generation command will not do exactly the same key — it will be another key, and you will need to generate a CSR for it and reissue the certificate https://fozzy.com/ — THE FASTEST HOSTING! 😎👍🏻 🔸 Shared Hosting from $3.9 / month. 🔸 Domains from $0.82 / year. 🔸 Linux VPS & Windows VPS from $8.99 / month. 🔸 SSL certificates from $6.9 / year.
Views: 1400 Fozzy Inc
Easy connection to AWS EC2 virtual instance with SSH and private key
 
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This tutorial shows you how to connect to AWS EC2 virtual instance in 4 minutes using SSH from command line. Please leave a like if you enjoyed this video.
Views: 1834 Moruf A. Ajibike
Using Kryptos to make and use public and private keys
 
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Using the program Kryptos to create a public key and a private key, and using those keys to encrypt a file and decrypt a file.
Views: 28 Cuyle Borden
Symantec™ ECC SSL Certificate Latest Enhanced Approach to public-key Cryptography
 
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Elliptic Curve Cryptography is an attractive, efficient and effective alternative to RSA cryptography, offering exponentially stronger SSL security with much shorter, more efficient keys. Symantec is a leader in ECC technology, with greater root ubiquity and service than our competitors.
Views: 256 The SSL Store™
SFTP - Login to SFTP Server without Password using CygWin OpenSSH 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: 5283 CodeCowboyOrg
Intro to Digital Certificates
 
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This tutorial starts with a review of Symmetric and Asymmetric (PKI) Encryption. It discusses self signed certificates and how an SSL certificate is used in a Client-Server web communication session.
Views: 105904 Dave Crabbe
X.509 AUTHENTICATION SERVICE PART 1 - NETWORK SECURITY
 
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X.509 AUTHENTICATION SERVICE PART 1 - NETWORK SECURITY #networksecuritylectures, #informationsecuritylectures, #x509authenticationservice
HOW TO HACK PRIVATE KEY BITCOIN ADDRESS
 
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Views: 33011 twin fiter
Java prog#129. How to encrypt and decrypt data in Java Part 1
 
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Views: 101605 ProgrammingKnowledge
public key distribution
 
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several techniques have been proposed for the distribution of public keys.virtually all these proposals can be grouped into the following general schemes: 1.public announcement 2.publicly available directory 3.public key authority 4.public key certificates.
Views: 119 SHAIK MEERJAVALI
Extended Euclidean Algorithm and Inverse Modulo Tutorial
 
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Using EA and EEA to solve inverse mod.
Views: 394315 Emily Jane