$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
Year
–
Must have
Reset

34 challenges · browse all techniques

Challenge CTF Weight Category Has
FailedHashFunction
#custom-hash#bit-manipulation
 UTCTF 2022 – Crypto files wu 2
Sunset
#subset-sum#convolution
 UTCTF 2022 – Crypto files wu 2
CipherGauntlet
#multi-layer-encoding#caesar-cipher
 UTCTF 2021 – Crypto files wu 3
SizzlingBacon
#baconian-cipher
 UTCTF 2021 – Crypto files wu 3
VariousVernacular
#substitution-cipher
 UTCTF 2021 – Crypto files wu 2
Scrambled UTCTF 2022 – Crypto files wu 1
ABitWeird UTCTF 2021 – Crypto files wu 2
IllegalPrime UTCTF 2021 – Crypto files wu 3
Sleeves UTCTF 2021 – Crypto files wu 2
Fortune_Teller UTCTF 2026 – Crypto files
Oblivious_Error UTCTF 2026 – Crypto files
Smooth_Criminal UTCTF 2026 – Crypto files
Autokey_Cipher UTCTF 2025 – Crypto files
DCA UTCTF 2025 – Crypto files
Espathra_Csatu_Banette UTCTF 2025 – Crypto files
RSA UTCTF 2025 – Crypto files
Cryptordle UTCTF 2024 – Crypto files src
Forgery UTCTF 2024 – Crypto files
RSA_256 UTCTF 2024 – Crypto files
baby rsa UTCTF 2024 – Crypto files src
bits_and_pieces UTCTF 2024 – Crypto files src
blsforgery UTCTF 2024 – Crypto files src
long caesar UTCTF 2024 – Crypto files src
numbers go brrr 2 UTCTF 2024 – Crypto files src
numbers_go_brrr UTCTF 2024 – Crypto files src
simple morse UTCTF 2024 – Crypto files src
simple signature UTCTF 2024 – Crypto files src
Affinity UTCTF 2023 – Crypto files
LooksWrongtomE UTCTF 2023 – Crypto files
ProvablyInsecure UTCTF 2023 – Crypto files
ReallyLooksWrongtomE UTCTF 2023 – Crypto files
Forky UTCTF 2022 – Crypto files
Matrices UTCTF 2021 – Crypto files
SmallPProblems UTCTF 2021 – Crypto files