$ ctf42

#run-length-encoding CTF challenges

4 CTF challenges using run-length-encoding from 4 CTFs (2021–2026), 4 with writeups. Mostly Reverse (50%) and Crypto (25%).

Reverse · 2 Crypto · 1 Forensics · 1

Often combined with

#custom-encoding 1 #reversing 1 #figlet 1 #byte-pair-encoding 1

Challenges

Filter and sort these in the challenge browser →

Challenge CTF Weight Category Has
Hidden_Frequencies
#run-length-encoding
 BCACTF 2022 – Crypto files wu 2
compression
#run-length-encoding#byte-pair-encoding#figlet
 VuwCTF 2026 25.00 Forensics files wu 1
Tiny
#reversing#run-length-encoding
 V1T 2026 22.14 Reverse files wu 1
File.tetr
#custom-encoding#run-length-encoding
 UTCTF 2021 – Reverse files wu 1