picoCTF - 13

Posted on Jan 25, 2026
  • URL: https://play.picoctf.org/practice/challenge/62
  • Title: 13
  • Tags: Easy, Cryptography, picoCTF 2019
  • Author: Alex Fulton/Daniel Tunitis
  • Started: 20 July 2025
  • Solved: 20 July 2025
  • Description: Cryptography can be easy, do you know what ROT13 is? cvpbPGS{abg_gbb_onq_bs_n_ceboyrz}

The encrypted flag is in the description. In fact, this is a similar problem to Mod 26. I just use my swiss-army knife for CTF which is CyberChef again.

alt text

picoCTF{not_too_bad_of_a_problem}