Challenges

Category Web Pwn Reverse Crypto Forensics Misc OSINT Stego Blockchain Hardware Mobile

Difficulty Beginner Easy Medium Hard Insane

CTFtime weight

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Higher weight ≈ harder, more prestigious event.

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CTF

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Challenge	CTF	Weight	Category	Has
Sign_Wars #ecdsa #biased-nonce #lattice #mt19937	SECCON 2021	–	Crypto	files wu 1
Vending_Machine #ecdsa #biased-nonce #signature-malleability #python-hash-collision #lattice	PwnMe 2025 Quals	24.95	Crypto	files wu 1