• URL: https://play.picoctf.org/practice/challenge/144
• Title: Mod 26
• Tags: Cryptography, Easy, picoCTF 2021
• Author: PANDU
• Started: 20 July 2025
• Solved: 20 July 2025
• Description: Cryptography can be easy, do you know what ROT13 is? values.txt

values.txt contains this text

cvpbPGS{arkg_gvzr_V'yy_gel_2_ebhaqf_bs_ebg13_45559noq}

As stated by definition, I was expected to decrypt the flag using ROT13. ROT13 is a way to decrypt and encrypt an alphabetic text by shifting its order cyclically by 13. A becomes N, B becomes M, et cetera. Below is the table

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• URL: https://play.picoctf.org/practice/challenge/265
• Title: Enhance!
• Tags: Medium, Forensics, picoCTF 2022, svg
• Author: LT ‘syreal’ Jones
• Started: 18 July 2025
• Solved: 18 July 2025
• Description: Download this image file and find the flag.

When I opened the drawing.flag.svg, this image appears

Tinkering around with the browser DevTools and inspecting the elements, I found interesting tspans

There you have it, just concatenate all inner values of tspans

p i c o C T F { 3 n h 4 n c 3 d _ 2 4 3 7 4 6 7 5 }

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