July 10, 2024, 8:38 a.m. | Mohsin Mukhtiar Lashari

DEV Community dev.to


Points: 10

Jeopardy style CTF

Category: Cryptography


Cryptography can be easy, do you know what ROT13 is?


ROT13 is a cipher that rotates each character 13 letters over. The mod 26 is a hint about looping back around. You can use an online decoder but since I'm trying to explain things a bit more here I decided to make a small script to decode this:

# initial encrypted text
flag = "cvpbPGS{arkg_gvzr_V'yy_gel_2_ebhaqf_bs_ebg13_MAZyqFQj}"

# A-Z
AZ …

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