Encryption - Crypto 101

#Task 2 Key terms 
- Are SSH keys protected with a passphrase or a password?
passphrase

#Task 3 Why is Encryption important? 
- What does SSH stand for?
secure shell


- How do webservers prove their identity?
cetificate


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


#Task 4 Crucial Crypto Maths 
- What's 30 % 5? 
0


- What's 25 % 7
4

- What's 118613842 % 9091
3565

#Task 5 Types of Encryption 
- 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?
Triple DES


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


#Task 6 RSA - Rivest Shamir Adleman 
- p = 4391, q = 6659. What is n? 
hint: https://www.cs.drexel.edu/~jpopyack/IntroCS/HW/RSAWorksheet.html
29239669


#Task 7 Establishing Keys Using Asymmetric Cryptography 

#Task 8 Digital signatures and Certificates 
- What company is TryHackMe's certificate issued to? 
cloudflare


#Task 9 SSH Authentication 
- What algorithm does the key use?
rsa

- Crack the password with John The Ripper and rockyou, what's the passphrase for the key?
hint: /usr/share/john/ssh2john.py idrsa.id_rsa > newhash.txt
john newhash.txt --wordlist=/home/gd/Downloads/rockyou.txt
delicious


#Task 11 PGP, GPG and AES 
- You have the private key, and a file encrypted with the public key. Decrypt the file. What's the secret word?
hint: gpg --help
gpg --import tryhackme.key
gpg message.gpg
cat message
Pineapple


https://tryhackme.com/room/encryptioncrypto101
https://www.thedutchhacker.com/encryption-crypto-101-on-tryhackme/
https://fthcyber.com/2020/09/30/encryption-crypto-101-writeup-tryhackme/
https://vicksecurity.com/tryhackme/encryption-crypto-101-tryhackme-writeup/