OverTheWire Bandit Level 11 → 12 Walkthrough
Decoding a ROT13 cipher using the tr command
OverTheWire Bandit Level 11 → 12 Walkthrough
Level goal: The password for the next level is stored in the file data.txt, where all lowercase (a-z) and uppercase (A-Z) letters have been rotated by 13 positions
Commands you may need: grep, sort, uniq, strings, base64, tr, tar, gzip, bzip2, xxd
Helpful reading:
Write-up
cat data.txt to get the Rot13-encrypted text. A simple way would be to decrypt using one of the various online tools available.
Another method is using the tr command for rotation by 13, to get the password.
1
bandit11@melinda:~$ cat data.txt | tr 'n-za-mN-ZA-M' 'a-zA-Z'
Level 12 password:
5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu