PicoCTF Writeup – Mod 26
# Information:
CTF Name: PicoCTF
CTF Challenge: Mod 26
Challenge Category: Cryptography
Challenge Points: 10
picoCTF 2021
# Used Tools:
- rot13.com
# Challenge Description:
Cryptography can be easy, do you know what ROT13 is?
cvpbPGS{arkg_gvzr_V’yy_gel_2_ebhaqf_bs_ebg13_hyLicInt}
Hints:
# Writeup
Hello, and welcome to another picoCTF challenge write-up. First, we searched for a Rot13 decoder, and then we choose the one that you can get in the section Used Tools.
Step 1
We copied the text that we wanted to decode and pasted it into the Rot13¹ decoder, and we where presented with the flag.
¹What does the rot13 do?
The Rot13 is a letter substitution cipher and is used when someone wants to encode or decode a phrase. The Rot13 substitutes a letter with the 13th letter after in the alphabet.
For instance, if I want to replace the letter A, I will be presented with the letter N (as you can see in the image below). It is the N because it is the thirteenth letter counting from the A.
And the flag is:
Thank you very much for reading!
Cheers,
SoBatista
