$ ctf42

#caesar-cipher CTF challenges

13 CTF challenges using caesar-cipher from 11 CTFs (2021–2026), 13 with writeups. Mostly Crypto (62%) and Reverse (31%).

Crypto · 8 Reverse · 4 Forensics · 1

Often combined with

#shift-cipher 1 #riscv 1 #harmonyos 1 #valgrind 1 #vex-ir 1 #mirdek-cipher 1 #multi-layer-encoding 1 #binary-patching 1

Challenges

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Challenge CTF Weight Category Has
CipherGauntlet UTCTF 2021 – Crypto files wu 3
Julius_ancient_script DCTF 2021 – Crypto files wu 3
double-trouble HSCTF 2023 – Crypto files wu 3
Cards_Galore UMDCTF 2021 – Crypto files wu 2
Rotations VishwaCTF 2021 – Reverse files wu 2
Valgrind RCTF 2021 – Reverse files wu 1
Hi_Harmony RCTF 2021 – Reverse files wu 1
Recovered_Signal_File JerseyCTF 2026 37.00 Forensics files wu 1
Knights_Droid KnightCTF 2025 18.78 Reverse files wu 1
Attn_Agents JerseyCTF 2024 21.26 Crypto files wu 1
Coin_Code DEADFACE 2023 – Crypto files wu 1
spin WRECKCTF 2022 – Crypto files wu 1
DealBreaking TrollCAT 2021 21.87 Crypto files wu 1