OverTheWire Krypton Guide

Access

SSH: ssh krypton1@krypton.labs.overthewire.org -p 2231

Password: KRYPTONISGREAT

Info

Welcome to Krypton! The first level is easy. The following string encodes the password using Base64:
S1JZUFRPTklTR1JFQVQ=
Use this password to log in to krypton.labs.overthewire.org with username krypton1 using SSH on port 2231. You can find the files for other levels in /krypton/

Theory

To enter the game we first have to know how to use SSH, which if you don't, it's already done and explained in other OverTheWire wargames like Bandit and Leviathan, which you can check out in this website. The description already gives us most of the details for our SSH command, although the password is given to us in Base64, which is one of the easiest ciphers out there, and there's a bajillion websites that encode and decode it. Anyway, with the stuff in the description we get an SSH command like this:

ssh krypton1@krypton.labs.overthewire.org -p 2231

Solution

If we decode the string given to us in the description with a Base64 decoder, we get this:

S1JZUFRPTklTR1JFQVQ=
KRYPTONISGREAT

Now we can enter the level with the SSH command and the decoded password, and we are greeted by this message:

C:\Users\shukularuni\Documents>ssh krypton1@krypton.labs.overthewire.org -p 2231
                      _                     _
                     | | ___ __ _   _ _ __ | |_ ___  _ __
                     | |/ / '__| | | | '_ \| __/ _ \| '_ \
                     |   <| |  | |_| | |_) | || (_) | | | |
                     |_|\_\_|   \__, | .__/ \__\___/|_| |_|
                                |___/|_|

                      This is an OverTheWire game server.
            More information on http://www.overthewire.org/wargames

krypton1@krypton.labs.overthewire.org's password: KRYPTONISGREAT
...
For more information regarding individual wargames, visit http://www.overthewire.org/wargames/

For support, questions or comments, contact us on discord or IRC.

Enjoy your stay!