Skip to content

Files

Latest commit

 

History

History

Encryption-Crypto-101

Folders and files

NameName
Last commit message
Last commit date

parent directory

..
README.md
README.md
 
 

README.md

Encryption - Crypto 101

  • I'm ready to learn about encryption

    no answer needed

  • I agree not to complain too much about how theory heavy this room is.

    no answer needed

  • Are SSH keys protected with a passphrase or a password?

    • passphrase

  • What does SSH stand for?

    • secure shell

  • How do webservers prove their identity?

    • certificate

  • What is the main set of standards you need to comply with if you store or process payment card details?

    • PCI-DSS

  • What's 30 % 5?

    • 0

  • What's 25 % 7

    • 4

  • What's 118613842 % 9091

    • python3
    • 118613842 % 9091
    • ****

  • Should you trust DES? Yea/Nay

    • Nay

  • What was the result of the attempt to make DES more secure so that it could be used for longer?

    • Google it!

  • Is it ok to share your public key? Yea/Nay

    • Yea

  • p = 4391, q = 6659. What is n?

    • python3
    • 4391 * 6659
    • ********

  • I understand enough about RSA to move on, and I know where to look to learn more if I want to.

    no answer needed

  • I understand how keys can be established using Public Key (asymmetric) cryptography.

    no answer needed

  • What company is TryHackMe's certificate issued to?

    • In your browser click on the lock icon near to the URL of tryhackme.
    • Look at the certificate.
    • **********

  • I recommend giving this a go yourself. Deploy a VM, like Learn Linux and try to add an SSH key and log in with the private key.

    no answer needed

  • Download the SSH Private Key attached to this room.

    no answer needed

  • What algorithm does the key use?

    • rsa

  • Crack the password with John The Ripper and rockyou, what's the passphrase for the key?

    • python2 /usr/share/john/ssh2john.py idrsa.id_rsa > id_rsa.hash
    • john --wordlist=/usr/share/wordlists/rockyou.txt id_rsa.hash
    • *********

  • I understand how Diffie Hellman Key Exchange works at a basic level

    no answer needed

  • Time to try some GPG. Download the archive attached and extract it somewhere sensible.

    no answer needed

  • You have the private key, and a file encrypted with the public key. Decrypt the file. What's the secret word?

    • gpg --import tryhackme.key
    • gpg -d message.gpg
    • *********

  • I understand that quantum computers affect the future of encryption. I know where to look if I want to learn more.

    no answer needed