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
symatrix #image-steganography #c-reversing	GoogleCTF 2023	–	Misc	files wu 1
Blocks #qr-code #image-steganography	ASIS 2014 Quals	–	Stego	files wu 1
You_Have_Not_Seen_My_Colors #image-steganography #channel-masking #elian-script	Z0d1ak 2026 Quals	25.00	Crypto	files wu 1