Difficulty: easy

Category: crypto

Author: xnull

Description:

### Intercepted Message

We intercepted an encrypted message that uses a Caesar cipher (also known as a shift cipher).

In this cipher, each letter is shifted by a fixed number of positions in the alphabet.

Solution

We are presented with the string RAQYZ{pnrfne_jnf_abg_irel_frpher_9s2n}. We can simply transform this with chepy:

>>> from chepy import Chepy
>>> Chepy("RAQYZ{pnrfne_jnf_abg_irel_frpher_9s2n}").rot_13().o
b'ENDLM{caesar_was_not_very_secure_9f2a}'

Flag: ENDLM{caesar_was_not_very_secure_9f2a}