Beautiful is better than ugly.
Beginner Hint
- Read the generation code to see exactly how the archive was created.
- Search for an attack against ZipCrypto when part of the plaintext is known.
zen.zip
Topic: ZIPReleased: Jul 29, 2026
A CTF challenge series with fun puzzles to enjoy every day
We regularly publish simple, beginner-friendly or educational CTF challenges!
Solve each challenge within its time window to appear on the leaderboard.
Discussion with friends or AI is welcome (account sharing is prohibited).
Sharing solutions is allowed only after the challenge period has ended.
Try the first challenge
Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.
tchentchen
ark
pppp4649
hiikunztchentchentchentchentchen
tan90909090Want a harder challenge?
Go to B-SIDE