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Challenges

Category
Difficulty
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Higher weight ≈ harder, more prestigious event.
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1454 challenges in family ⊕ crypto ✕ clear · browse all techniques

Challenge CTF Weight Category Has
Patcher_1
#binary-patching
 KBxAc 2026 – Reverse files wu 1
Patcher_2
#binary-patching
 KBxAc 2026 – Reverse files wu 1
Shherrr
#raku#xor
 KBxAc 2026 – Reverse files wu 1
Ten_Symbols
#symbol-cipher#pigpen-cipher#semaphore
 KBxAc 2026 – Crypto files wu 1
Weiner
#rsa#wiener-attack
 KBxAc 2026 – Crypto files wu 1
simphell
#haskell-reversing#xor
 KBxAc 2026 – Reverse files wu 1
Black_Box
#binary-format-reversing#xor
 Z0d1ak 2026 Quals 25.00 Forensics files wu 1
cyclotomic_echo
#falcon#ntru#lattice#cvp#signature-forgery
 Z0d1ak 2026 Quals 25.00 Crypto files wu 1
layer_eight
#docker-layers#whiteout-files#aes-gcm
 Z0d1ak 2026 Quals 25.00 Forensics files wu 1
rival_battle
#prng#deterministic-simulation#route-search
 Z0d1ak 2026 Quals 25.00 Reverse files wu 1
siren
#ecdsa#biased-nonce#hidden-number-problem#lattice
 Z0d1ak 2026 Quals 25.00 Crypto files wu 1
stars_below
#plt-relocation-trap#custom-vm#base32
 Z0d1ak 2026 Quals 25.00 Reverse files wu 1
Cryptografie
#java-reflection#filesystempreferences-encoding
 plfanzen 2026 25.00 Crypto files wu 1
forgetful
#rsa#phi-multiple-leak#factoring
 plfanzen 2026 25.00 Crypto files wu 1
Mind_Boggle
#brainfuck#nested-encoding
 BuckeyeCTF 2025 – Misc files wu 1
cube_cipher
#cipher-cycle-detection
 BuckeyeCTF 2025 – Crypto files wu 1
nitwit
#winternitz-ots-forgery
 BuckeyeCTF 2025 – Crypto files wu 1
vorpal_sword
#oblivious-transfer#rsa
 DiceCTF 2025 Quals 81.00 Crypto files src
winxy_pistol
#oblivious-transfer
 DiceCTF 2025 Quals 81.00 Crypto files src
SH_RSA
#rsa#signature-forgery
 DownUnderCTF 2025 91.66 Crypto files src
good_game_spawn_point
#paillier#bsgs#elliptic-curve
 DownUnderCTF 2025 91.66 Crypto files src
hungry-hungry-caterpillar
#xor#known-plaintext
 DownUnderCTF 2025 91.66 Crypto files src
yet_another_login
#paillier#homomorphic-encryption#length-extension
 DownUnderCTF 2025 91.66 Crypto files src
basic_sums
#digit-sum-crt
 KalmarCTF 2025 33.89 Crypto files wu 2
Attack_of_the_Clones
#rlwe-error-reuse
 LakeCTF 2025 Quals – Crypto files wu 1
Ez_Part
#pohlig-hellman
 LakeCTF 2025 Quals – Crypto files wu 1
Guess_Flag
#digit-oracle
 LakeCTF 2025 Quals – Crypto files wu 1
Revenge_of_the_Sith
#lll-lattice-attack
 LakeCTF 2025 Quals – Crypto files wu 1
The_Phantom_Menace
#private-key-disclosure
 LakeCTF 2025 Quals – Crypto files wu 1
drum_machine
#constraint-solving
 LakeCTF 2025 Quals – Reverse files wu 1
grammar_nazi
#rsa-polynomial-root-recovery
 MaltaCTF 2025 Quals 24.95 Crypto files wu 1
Slim_Shady
#malware-analysis#resource-extraction#xor#process-injection
 Null 2025 – Misc files wu 1
Back_to_the_past
#srand-time-seed#lcg#bruteforce
 PwnMe 2025 Quals 24.95 Reverse files wu 1
Easy_Diffy
#diffie-hellman#degenerate-generator
 PwnMe 2025 Quals 24.95 Crypto files wu 1
Mafia_at_the_end_2
#smart-contract#predictable-rng#storage-read
 PwnMe 2025 Quals 24.95 Misc files wu 1
Mirror_Hash
#custom-hash#birthday-attack#subset-sum#hash-collision
 PwnMe 2025 Quals 24.95 Crypto files wu 1
My_BetterZED
#aes-cfb#iv-reuse#keystream-reuse
 PwnMe 2025 Quals 24.95 Crypto files wu 1
My_Zed
#aes#iv-leaks-password#zlib#bruteforce
 PwnMe 2025 Quals 24.95 Crypto files wu 1
Vending_Machine
#ecdsa#biased-nonce#signature-malleability#python-hash-collision#lattice
 PwnMe 2025 Quals 24.95 Crypto files wu 1
Blindspot
#schnorr#nonce-reuse#signature-forgery
 SAS 2025 Quals 20.72 Web files wu 1