$ ctf42

Challenges

Category
Difficulty
CTFtime weight
–
Higher weight ≈ harder, more prestigious event.
Year
–
Must have
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10 challenges · browse all techniques

Challenge CTF Weight Category Has
Easy_Diffy
#diffie-hellman#degenerate-generator
 PwnMe 2025 Quals 24.95 Crypto 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
Square_Power PwnMe 2025 Quals 24.95 Crypto files
EncryptedCommunication PwnMe 2022 – Crypto files
ExponentialMachine PwnMe 2022 – Crypto files
RsaMadness PwnMe 2022 – Crypto files
ToBasics PwnMe 2022 – Crypto files