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

Country

Must have Source / Docker Writeup

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Challenge	CTF	Weight	Category	Has
Odd_One_Out #qr-code	UMassCTF 2025	48.38	Misc	files wu 1
QR_God #qr-code #error-correction	SekaiCTF 2023	24.86	Misc	files wu 1
XQR #xor #qr-code	BYUCTF 2022	–	Crypto	files src wu 2