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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:

magic number

Topic: PythonReleased: Mar 6, 2026

143 solves
Misc
Medium3.0

by

mora

mora

USER

SOLVED AT

hiro-rm-rf

2026/09/13 13:35

2026/08/31 04:50

2026/08/27 08:42

2026/08/23 10:56

2026/08/21 13:04

2026/08/03 12:28

2026/07/14 20:32

2026/07/11 10:31

2026/07/08 18:39

2026/07/08 05:39

2026/06/25 12:53

2026/06/18 17:08

2026/06/10 06:37

2026/06/03 06:17

2026/04/29 15:17

2026/04/27 05:23

2026/04/25 06:08

2026/04/16 05:10

2026/04/15 19:22

2026/04/10 15:11

2026/04/09 14:27

2026/04/09 12:18

2026/04/07 08:53

2026/04/03 19:23

2026/04/01 13:14

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