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
repeat #repeating-key-xor	UofTCTF 2024	23.90	Crypto	files wu 3
Cowsay #repeating-key-xor #xortool	PatriotCTF 2022	24.52	Crypto	files src wu 1
OTP1 #repeating-key-xor #xortool	BlueHens 2021	22.62	Crypto	files wu 1
h4XOR #repeating-key-xor	HeroCTF 2021	35.17	Crypto	files wu 3