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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
tchentchen
Not so Pyf**k
Misc
Medium
52 solves
Submissions (latest 3)
nomeaning

SOLVED!

Aug 9, 9:05 PM

Leaderboard

Try the first challenge

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

View challenge
admin
AlpacaHack 2100
Misc
Welcome🌱
2,084 solves
Upcoming challenges reveal the , , and in advance.
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Jun 2026

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1
admin
Half-Year Recap
Misc
Welcome🌱
296 solves
2
minaminaominaminao
Cache Me If You Can
Web
Easy🌱
264 solves
3
minaminaominaminao
vm1
Misc
Medium
111 solves
4
pppp4649pppp4649
Small e
Crypto
Easy🌱
177 solves
5
minaminaominaminao
RPS GAME
Misc
Crypto
Medium
104 solves
6
nozokare
Flag for localhost
Web
Easy🌱
206 solves
7
tan90909090tan90909090
C++ flag checker
Rev
Hard
92 solves
8
shiragishiragi
Guess IP
Misc
Easy🌱
160 solves
9
nozokare
A Piece of DHKE
Crypto
Medium
86 solves
10
shiragishiragi
chmod-swapper
Misc
Medium
91 solves
11
tchentchen
Alpaca Certification
Web
Easy🌱
177 solves
12
rsk0315
Floating Equality
Misc
Medium
95 solves
13
pppp4649pppp4649
Elliptic Equation
Crypto
Hard
63 solves
14
tchentchen
CAuth
Web
Hard
76 solves
15
minaminaominaminao
SITE/2
Web
Easy🌱
146 solves
16
tan90909090tan90909090
Xored PNG
Misc
Medium
94 solves
17
tchentchen
Looks like Alpacahack
Web
Medium
91 solves
18
shiragishiragi
Catrunner 2
Misc
Medium
111 solves
19
minaminaominaminao
Flag Printer 20XX
Misc
Hard
66 solves
20
nozokare
xorshift521
Crypto
Hard
58 solves
21
k0080k0080
what-is-my-size
Pwn
Hard
78 solves
22
minaminaominaminao
✌️✌️✌️
Crypto
Easy🌱
112 solves
23
tchentchen
Secret Renderer
Web
Medium
91 solves
24
kanonkanon
honk the klaxon
Crypto
Medium
63 solves
25
colza
voyage
Misc
Easy🌱
115 solves
26
rsk0315
Decimal float 101.0
Misc
Medium
70 solves
27
bubububu
Style Your Alpaca
Web
Hard
61 solves
28
pppp4649pppp4649
Only forward
Pwn
Hard
72 solves
29
tchentchen
Nano Services
Web
Medium
90 solves
30
minaminaominaminao
Super Short System Exit
Misc
Medium
88 solves
1
admin
Alpaca Nation
Misc
Welcome🌱
286 solves
2
hiikunzhiikunz
Flag is A+B
Crypto
Easy🌱
181 solves
3
tchentchen
Lucky Redirect
Web
Easy🌱
164 solves
4
hiikunzhiikunz
Renda
Rev
Medium
123 solves
5
tchentchen
IP Blocked Secret
Web
Hard
70 solves

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