Over the Wire - Krypton 1

Krypton 1

Objectives
The password for level 2 is in the file ‘krypton2’. It is ‘encrypted’ using a simple rotation. It is also in non-standard ciphertext format. When using alpha characters for cipher text it is normal to group the letters into 5 letter clusters, regardless of word boundaries. This helps obfuscate any patterns. This file has kept the plain text word boundaries and carried them to the cipher text. Enjoy!

Solution

So from the description its sounds like a Cesar cipher

lets cat the file to see what it contains

krypton1@krypton:/krypton/krypton1$ cat krypton2YRIRY GJB CNFFJBEQ EBGGRA

I'm guessing just on experience that is probably a 13 shift Cesar cipher other wise know as ROT13

let echo it and pipe it in to the translate command

echo "YRIRY GJB CNFFJBEQ EBGGRA" | tr '[A-Za-z]' '[N-ZA-Mn-za-m]'LEVEL TWO PASSWORD ROTTEN