$ ctf42

#encoding CTF challenges

6 CTF challenges using encoding from 6 CTFs (2021–2025), 6 with writeups.

Crypto · 6

Often combined with

#base64 2 #cyberchef-magic 1 #multi-layer-encoding 1 #hex-to-ascii 1 #nibble-swap 1 #xor 1

Challenges

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Challenge CTF Weight Category Has
Poor_Megan
#cyberchef-magic#encoding
 DEADFACE 2025 – Crypto files wu 3
This_one_is_really_basic
#base64#encoding
 DCTF 2021 – Crypto files wu 2
Baby_Encoder
#encoding#xor
 TMUCTF 2021 – Crypto files wu 1
CCCCC
#encoding#nibble-swap
 TFC 2024 – Crypto files wu 1
Decode
#encoding#hex-to-ascii#multi-layer-encoding
 DaVinciCTF 2021 24.50 Crypto files wu 1
EasyPeasy
#base64#encoding
 Tenable 2021 22.37 Crypto files wu 1