Bandit Walkthrough – Level 11

Level Description

http://www.overthewire.org/wargames/bandit/bandit12.shtml

The purpose of this level is to teach you how manipulate files on the fly. The password for bandit12 is in the file data.txt where all lowercase (a-z) and uppercase (A-Z) letters have been rotated by 13 positions.

Hint

This can be very difficult to figure out on your own from scratch. If you get totally stuck, it may be best to look at the solution below and simply learn why it works. Once you understand that, you will be able to replicate it on your own.

Solution	Select Show
The command used to solve this is a little bit difficult to explain but I’ll give it my best shot. What we are doing is piping the output of data.txt to the tr (translate) command. In the tr command we are telling it to turn the set A-Z and a-z into N-Z,A-M and n-z,a-m. The reason for splitting the translated alphabet up is because we need to shift everything down 13 characters, meaning anything coming after N has to go back to the beginning (S becomes F). If you are interested in this sort of thing, there are a number of great cryptography resources out there that start off simple (rot13) and get much more advanced. [$]-> ssh bandit11@bandit.labs.overthewire.org [$]-> IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR [$]-> cat data.txt \| tr 'A-Za-z' 'N-ZA-Mn-za-m' The password for bandit12 is: 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu

Solution

Show

The command used to solve this is a little bit difficult to explain but I’ll give it my best shot. What we are doing is piping the output of data.txt to the tr (translate) command. In the tr command we are telling it to turn the set A-Z and a-z into N-Z,A-M and n-z,a-m. The reason for splitting the translated alphabet up is because we need to shift everything down 13 characters, meaning anything coming after N has to go back to the beginning (S becomes F). If you are interested in this sort of thing, there are a number of great cryptography resources out there that start off simple (rot13) and get much more advanced.

[$]-> ssh bandit11@bandit.labs.overthewire.org 
[$]-> IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR
[$]-> cat data.txt | tr 'A-Za-z' 'N-ZA-Mn-za-m'

The password for bandit12 is: 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu

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Bandit Walkthrough – Level 11

Level Description

Hint

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