picoCTF - Vigenere

Posted on Jan 25, 2026
  • URL: https://play.picoctf.org/practice/challenge/316
  • Title: Vigenere
  • Tags: Medium, Cryptography, picoCTF 2022
  • Author: Mubarak Mikail
  • Started: 21 July 2025
  • Solved: 21 July 2025
  • Description: Can you decrypt this message? Decrypt this message using this key “CYLAB”.

The text file contains

rgnoDVD{O0NU_WQ3_G1G3O3T3_A1AH3S_f85729e7}

The method is the same as easy1

alt text

picoCTF{D0NT_US3_V1G3N3R3_C1PH3R_d85729g7}