Over The Wire

Host: krypton.labs.overthewire.org

Port: 2231

Krypton Level 1

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

Objective

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!

CLI

krypton1@bandit:~$ cd /krypton/
krypton1@bandit:/krypton$ ls -la

total 36
drwxr-xr-x 9 root root 4096 Sep 19 07:10 .
drwxr-xr-x 25 root root 4096 Nov 28 03:49 ..
drwxr-xr-x 2 root root 4096 Sep 19 07:09 krypton1
drwxr-xr-x 2 root root 4096 Sep 19 07:09 krypton2
drwxr-xr-x 2 root root 4096 Sep 19 07:09 krypton3
drwxr-xr-x 2 root root 4096 Sep 19 07:10 krypton4
drwxr-xr-x 2 root root 4096 Sep 19 07:10 krypton5
drwxr-xr-x 3 root root 4096 Sep 19 07:10 krypton6
drwxr-xr-x 2 root root 4096 Sep 19 07:10 krypton7

krypton1@bandit:/krypton$ cd krypton1
krypton1@bandit:/krypton/krypton1$ ls -la
total 16

drwxr-xr-x 2 root root 4096 Sep 19 07:09 .
drwxr-xr-x 9 root root 4096 Sep 19 07:10 ..
-rw-r----- 1 krypton1 krypton1 26 Sep 19 07:09 krypton2
-rw-r----- 1 krypton1 krypton1 882 Sep 19 07:09 README

krypton1@bandit:/krypton/krypton1$ cat README

Welcome to Krypton!

This game is intended to give hands on experience with cryptography and cryptanalysis. The levels progress from classic ciphers, to modern, easy to harder.

Although there are excellent public tools, like cryptool,to perform the simple analysis, we strongly encourage you to try and do these without them for now. We will use them in later excercises.

** Please try these levels without cryptool first **

The first level is easy. The password for level 2 is in the file 'krypton2'. It is 'encrypted' using a simple rotation called ROT13. 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!

krypton1@bandit:/krypton/krypton1$ alias rot13="tr 'A-Za-z' 'N-ZA-Mn-za-m'"
krypton1@bandit:/krypton/krypton1$ alias rot5="tr '0-9' '5-90-4'"
krypton1@bandit:/krypton/krypton1$ alias rot="tr 'A-Za-z0-9' 'N-ZA-Mn-za-m5-90-4'"

krypton1@bandit:/krypton/krypton1$ cat krypton2
YRIRY GJB CNFFJBEQ EBGGRA
krypton1@bandit:/krypton/krypton1$ cat krypton2 | rot13
LEVEL TWO PASSWORD ROTTEN
krypton1@bandit:/krypton/krypton1$

Krypton

  1. Level 0
  2. ~ Level 1
  3. Level 2