Prompt #

The password for the next level is stored in the file data.txt, where all lowercase and uppercase letters have been rotated by 13 positions

Solution #

$ ssh bandit11@bandit.labs.overthewire.org -p 2220
bandit11@bandit.labs.overthewire.org password: IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR
bandit11@bandit:~$ cat data.txt | tr 'A-Za-z' 'N-ZA-Mn-za-m'
The password is 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu

References #

• Esham, B. (2007, September 8). ROT13 Table with Example. Wikimedia Commons. https://commons.wikimedia.org/wiki/File:ROT13_table_with_example.svg
• Mullen, S., & Ross, C. (2011, March 26). using ROT13 and tr command for having an encrypted email address. Stack Overflow. https://stackoverflow.com/a/5442495/7148921