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
Learning_from_errors	ECW 2025 Quals	–	Crypto	files
Mono_Poly	ECW 2025 Quals	–	Crypto	files
Old_proprietary_encryption	ECW 2025 Quals	–	Crypto	files
RSAd	ECW 2025 Quals	–	Crypto	files
SHAlphabet	ECW 2025 Quals	–	Crypto	files
rsa_rsa_rsa	ECW 2025 Quals	–	Crypto	files