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Daily AlpacaHack

A CTF challenge series with fun puzzles to enjoy every day

What is Daily AlpacaHack?

We regularly publish simple, beginner-friendly or educational CTF challenges!

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Solve each challenge within its time window to appear on the leaderboard.

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Today's Challenge
2501
The 3rd
Crypto
Hard
10 solves
Submissions (latest 3)
toomer

SOLVED!

Sep 21, 6:49 PM

kakur41

SOLVED!

Sep 21, 6:27 PM

Leaderboard

Try the first challenge

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

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admin
AlpacaHack 2100
Misc
Welcome🌱
2,211 solves
Upcoming challenges reveal the , , and in advance.
Prev

Sep 2026

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tchentchen
Springing
Web
Medium
74 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
124 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
101 solves
3-4
tan90909090tan90909090
Let's Shut Down Linux
Misc
Medium
63 solves
5
baumroll1234
6-8
minaminaominaminao
Bitflip RSA
Crypto
Hard
56 solves
 
minaminaominaminao
Bitflip RSA
Crypto
Hard
56 solves
9-11
minaminaominaminao
\^o^/
Misc
Hard
43 solves
12-13
tan90909090tan90909090
sin function vs. fsin instruction
Rev
Misc
Medium
55 solves
14-15
tan90909090tan90909090
integer division
Misc
Medium
69 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
41 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
39 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
39 solves
22-24
2501
The 3rd
Crypto
Hard
10 solves
25
Coming soon
26
Coming soon
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
1
Coming soon
2
Coming soon
3
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4
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Writeups

Writeup for flag obfuscation

enesbasmaci

en
flag obfuscation

1 hour ago

Rows:

secret-table

Topic: SQLReleased: Jan 8, 2026

336 solves
Web
Medium3.5

by

ark

ark

USER

SOLVED AT

shuta8

2026/09/18 07:33

2026/09/18 04:18

2026/09/16 08:20

2026/09/14 08:01

2026/09/11 01:45

2026/09/08 15:32

2026/09/08 04:46

2026/09/06 17:03

2026/09/01 16:30

2026/09/01 07:57

2026/08/30 02:57

2026/08/30 02:38

2026/08/23 04:39

2026/08/21 13:50

2026/08/20 18:19

2026/08/18 06:07

2026/08/18 05:06

2026/08/17 14:26

2026/08/11 19:01

2026/08/11 17:47

2026/08/11 13:20

2026/08/09 15:51

2026/08/08 12:23

2026/08/04 10:15

2026/07/25 11:38

Rows:

descriptionsolveswriteups