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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
25 solves
Submissions (latest 3)
prof

SOLVED!

Sep 22, 3:03 PM

Leaderboard

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admin
AlpacaHack 2100
Misc
Welcome🌱
2,214 solves
Upcoming challenges reveal the , , and in advance.
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Sep 2026

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tchentchen
Springing
Web
Medium
74 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
126 solves
2
hiikunzhiikunz
base 16-32-64
Misc
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102 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
70 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
41 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
43 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
43 solves
22-24
2501
The 3rd
Crypto
Hard
25 solves
25
Coming soon
26
Coming soon
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
1
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2
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3
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Writeups

Writeup for nested eval

baumroll1234

ja
nested eval

18 hours ago

Rows:

The future path

Topic: RNGReleased: Mar 16, 2026

100 solves
Crypto
Medium5.5

by

pppp4649

pppp4649

USER

SOLVED AT

mavil27

2026/09/08 03:55

2026/08/05 13:06

2026/07/26 08:49

2026/07/20 05:03

2026/07/04 11:51

2026/07/02 12:34

2026/05/04 09:21

2026/04/25 08:14

2026/03/28 01:26

2026/03/27 07:31

2026/03/27 03:17

2026/03/25 12:24

2026/03/25 08:19

2026/03/24 21:30

2026/03/24 20:03

2026/03/22 16:52

2026/03/22 11:40

2026/03/22 05:22

2026/03/21 08:43

2026/03/20 11:07

2026/03/17 12:54

2026/03/17 06:42

2026/03/17 06:23

2026/03/16 22:39

2026/03/16 14:55

Rows:

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