$ ctf42

Challenges

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873 challenges in family ⊕ crypto ✕ clear · browse all techniques

Challenge CTF Weight Category Has
LockDown
#hardware-reversing#verilog#z3
 WolvCTF 2025 47.25 Reverse files wu 1
cratecrack
#heap-uaf#ecdsa-nonce-bias
 bi0sCTF 2025 95.79 Pwn files wu 1
XOR_101
#xor#repeating-key
 squ1rrel 2025 24.25 Crypto files wu 1
curved-mvm
#ecdsa#weak-nonce#nonce-bruteforce#signature-forgery
 x3ctf 2025 – Crypto files wu 1
man_vs_matrix
#linear-algebra#matrix-inversion#finite-field
 x3ctf 2025 – Crypto files wu 1
Layers
#file-concatenation#binary-to-ascii-decoding
 1337UP 2024 – Misc files wu 1
Quick_Recovery
#qr-code-reconstruction#brute-force-permutation
 1337UP 2024 – Misc files wu 1
Encryptor_Shop
#rsa-shared-prime
 BCACTF 2024 – Crypto files wu 1
RSAEncrypter
#hastad-broadcast
 BCACTF 2024 – Crypto files wu 1
This_is_NOT_the_flag
#xor-bruteforce
 BCACTF 2024 – Misc files wu 1
Time_Skip
#scytale-cipher
 BCACTF 2024 – Crypto files wu 1
Vinegar_Times_3
#vigenere-cipher
 BCACTF 2024 – Crypto files wu 1
XOR
#xor-decryption
 BCACTF 2024 – Reverse files wu 1
I_Like_McDonalds
#hash-length-extension-attack#mac-forgery
 BackdoorCTF 2024 – Crypto files wu 1
Honey
#hidden-number-problem#lattice-reduction#lll (lll-lattice-reduction)
 Crypto 2024 65.62 Misc files wu 1
Melek
#shamir-secret-sharing#lagrange-interpolation#non-coprime-exponent#modular-square-root
 Crypto 2024 65.62 Misc files wu 1
rps_casino
#lfsr#gf2-linear-system#z3#state-recovery
 DiceCTF 2024 Quals 54.40 Crypto files wu 2
winter
#winternitz#hash-based-signature#key-reuse#forgery
 DiceCTF 2024 Quals 54.40 Crypto files wu 3
yaonet
#ecdsa#partial-key-exposure#bsgs#discrete-log#nist-p256
 DiceCTF 2024 Quals 54.40 Crypto files wu 1
my_array_generator
#keystream-recovery
 DownUnderCTF 2024 68.04 Crypto files src wu 1
rusty_vault
#aes
 DownUnderCTF 2024 68.04 Reverse files wu 1
shufflebox
#permutation
 DownUnderCTF 2024 68.04 Crypto files src wu 1
Gleamering_Star
#bit-truncation
 HITCON 2024 Quals 100.00 Crypto files wu 1
Do_you_even_lift_bro
#prng
 Hack.lu 2024 100.00 Reverse files wu 2
Rust
#per-byte-bruteforce
 ImaginaryCTF 2024 49.81 Reverse files wu 1
base64
#radix-conversion
 ImaginaryCTF 2024 49.81 Crypto files src wu 2
unoriginal
#xor-cipher
 ImaginaryCTF 2024 49.81 Reverse files wu 1
dhash
#xor-cancellation
 IrisCTF 2024 24.59 Crypto files wu 1
Attn_Agents
#caesar-cipher
 JerseyCTF 2024 21.26 Crypto files wu 1
Crack_a_Mateo
#dictionary-attack
 JerseyCTF 2024 21.26 Crypto files wu 1
PasswordManager
#xor-cipher
 JerseyCTF 2024 21.26 Pwn files wu 1
adveRSAry
#leaked-prime
 JerseyCTF 2024 21.26 Crypto files wu 1
mutant_mayhem
#ecdsa
 JerseyCTF 2024 21.26 Crypto files wu 1
very_hot
#related-primes
 LA 2024 – Crypto files wu 2
G0tcha_G0tcha_doggy
#securerandom-prediction
 LINE 2024 – Web files wu 1
What_next
#mt19937-prediction
 Mapna 2024 24.59 Crypto files wu 2
Broken_OTP
#time-seeded-prng
 N0PSctf 2024 24.34 Crypto files wu 2
DHCPPP
#chacha20-poly1305#nonce-reuse#tag-forgery
 PlaidCTF 2024 95.19 Misc files wu 1
X64_Extension
#reversing#aes-ni
 SekaiCTF 2024 36.96 Reverse files wu 1
Build_A_Flag_Workshop
#reversing#constraint-solving
 SunshineCTF 2024 38.57 Reverse files wu 1