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!

Join Anytime

Solve within 24 hours of release to appear on the leaderboard.

Not a Competition

Discussion with friends or AI is welcome (account sharing is prohibited).

Solution Sharing Rules

Sharing solutions is allowed only after 24 hours have passed since release.

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Today's Challenge

Submissions (latest 3)

michikusamichiya

SOLVED!

Mar 6, 12:19 PM

ss8888888

SOLVED!

Mar 6, 12:07 PM

aruma256

SOLVED!

Mar 6, 12:05 PM

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Try the first challenge

Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.

Upcoming challenges reveal the , , and in advance.

Feb 2026

Solved

Unsolved

Upcoming

Mon

Tue

Wed

Thu

Fri

Sat

Sun

keymoon

git gc

Misc

Medium

141 solves

chocorusk

ToyPQC

Crypto

Hard

101 solves

tchen

No JS

Web

Medium

122 solves

k0080

shellcode-101

Pwn

Medium

120 solves

yu212

Linear Coffee Generator

Crypto

Hard

106 solves

ark

optimal-sort

Misc

Hard

96 solves

admin

Camelidae

Misc

Welcome

333 solves

minaminao

Substance

Crypto

Easy

222 solves

tan90909090

read-a-binary

Rev

Easy

197 solves

tchen

Magic Engine

Web

Easy

232 solves

kanon

RRe_Time_Limiter

Crypto

Medium

163 solves

minaminao

The World

Misc

Easy

169 solves

tan90909090

misdirection

Rev

Medium

141 solves

hiikunz

Compressor

Misc

Hard

101 solves

tchen

Plz Login

Web

Medium

197 solves

k0080

Alpaca-Llama Ranch

Pwn

Hard

113 solves

ark

destructuring

Misc

Easy

127 solves

hiikunz

AAAAAAAAEEEEEEEESSSSSSSS

Crypto

Medium

108 solves

minaminao

nc magic

Misc

Medium

121 solves

hiikunz

simple ROP

Pwn

Hard

98 solves

tchen

You are being redirected

Web

Medium

107 solves

kakur41

Alpaillier

Crypto

Medium

108 solves

rsk0315

wages of sin()

Rev

Misc

Hard

85 solves

k0080

Disappeared

Pwn

Medium

104 solves

minaminao

Pickle Loader

Misc

Medium

109 solves

rsk0315

Dancing Cursor

Rev

Misc

Medium

100 solves

pppp4649

CopperCopperCopper

Crypto

Hard

85 solves

k0080

Noob programmer

Pwn

Hard

92 solves

kakur41

Alpaca Quest

Rev

Medium

103 solves

minaminao

hit-and-hit

Misc

Medium

78 solves

tchen

Alpaca Rangers

Web

Medium

128 solves

kurenaif

One Byte Padding Oracle Attack

Crypto

Hard

67 solves

tchen

Rock Paper Scissors Lizard Spock

Web

Hard

85 solves

minaminao

pyjs

Misc

Hard

76 solves

admin

Alpaca meets QR

Misc

Welcome

163 solves

Want a harder challenge?

Go to B-SIDE

Writeups

Author's Writeup for Flag Printer 2026 minaminao author ja Flag Printer 2026 yesterday
Writeup for Bars baumroll1234 ja Bars 2 days ago
Writeup for pyjs rqda en pyjs 4 days ago
Writeup for pyjs tchen en pyjs 4 days ago
Writeup for pyjs hiikunz ja pyjs 4 days ago
Writeup for pyjs rsk0315 ja pyjs 5 days ago
Writeup for Daily AlpacaHack 2/22-2/28 kakur41 author ja Noob programmer +6 5 days ago
Writeup for pyjs toomer en pyjs 5 days ago
Writeup for One Byte Padding Oracle Attack baumroll1234 ja One Byte Padding Oracle Attack 5 days ago
Writeup for pyjs baumroll1234 ja pyjs 5 days ago

Rows:

AAAAAAAAEEEEEEEESSSSSSSS

Topic: AESReleased: Feb 12, 2026

108 solves

Crypto

Medium

Author:

hiikunz

Show Tags

🦙🦙🦙🦙🦙🦙🦙🦙

server.py

description solves writeups