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Daily AlpacaHack

A daily CTF challenge with a fun new puzzle every day

What is Daily AlpacaHack?

We publish one simple, beginner-friendly or educational CTF challenge every day!

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Today's Challenge
hiikunzhiikunz
Flag is A+B
Crypto
Easy🌱
28 solves
Submissions (latest 3)
kinner

SOLVED!

Jul 1, 6:53 PM

Leaderboard

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admin
AlpacaHack 2100
Misc
Welcome🌱
1,932 solves
Upcoming challenges reveal the , , and in advance.
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Jul 2026

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Writeups

Writeup for 108

haruhana

ja
108

16 hours ago

Daily AlpacaHackに挑戦するつくよみちゃん06/30/Super Short System Exit/minaminao

nitcelcius

Writeup for Super Short System Exit

Daily AlpacaHackに挑戦するつくよみちゃん06/29/Nano Services/tchen

ja

2026/06/29 16:42

nitcelcius

Writeup for Only forward

ja

2026/06/28 15:18

Rows:

Flag is A+B

Topic: MathematicsReleased: Jul 2, 2026

28 solves
Crypto
Easy🌱2.5

by

hiikunz

hiikunz

USER

SOLVED AT

kinner

36 minutes ago

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descriptionsolves