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.

Year

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CTF

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Must have Source / Docker Writeup

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Challenge	CTF	Weight	Category	Has
capy256k1 #invalid-curve-attack #ecc #crt	KubSTU 2026	24.83	Crypto	files wu 1
tiramisu #invalid-curve-attack #ecdh	GoogleCTF 2021	–	Crypto	files wu 1
kipferl #invalid-curve-attack	hxp 2021	99.41	Crypto	files wu 1
Invincible #invalid-curve-attack #ecc	FwordCTF 2021	24.42	Crypto	files wu 1