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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
admin
Baby Alpaca
Misc
Welcome🌱
37 solves
Submissions (latest 3)
goat-antony2008

SOLVED!

Oct 1, 2:39 AM

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🌱
2,235 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🌱
307 solves
2
minaminaominaminao
Cache Me If You Can
Web
Easy🌱
285 solves
3
minaminaominaminao
vm1
Misc
Medium
113 solves
4
pppp4649pppp4649
Small e
Crypto
Easy🌱
191 solves
5
minaminaominaminao
RPS GAME
Misc
Crypto
Medium
109 solves
6
nozokare
Flag for localhost
Web
Easy🌱
223 solves
7
tan90909090tan90909090
C++ flag checker
Rev
Hard
94 solves
8
shiragishiragi
Guess IP
Misc
Easy🌱
169 solves
9
nozokare
A Piece of DHKE
Crypto
Medium
88 solves
10
shiragishiragi
chmod-swapper
Misc
Medium
94 solves
11
tchentchen
Alpaca Certification
Web
Easy🌱
192 solves
12
rsk0315
Floating Equality
Misc
Medium
97 solves
13
pppp4649pppp4649
Elliptic Equation
Crypto
Hard
65 solves
14
tchentchen
CAuth
Web
Hard
78 solves
15
minaminaominaminao
SITE/2
Web
Easy🌱
158 solves
16
tan90909090tan90909090
Xored PNG
Misc
Medium
104 solves
17
tchentchen
Looks like Alpacahack
Web
Medium
100 solves
18
shiragishiragi
Catrunner 2
Misc
Medium
115 solves
19
minaminaominaminao
Flag Printer 20XX
Misc
Hard
68 solves
20
nozokare
xorshift521
Crypto
Hard
59 solves
21
k0080k0080
what-is-my-size
Pwn
Hard
81 solves
22
minaminaominaminao
✌️✌️✌️
Crypto
Easy🌱
124 solves
23
tchentchen
Secret Renderer
Web
Medium
95 solves
24
kanonkanon
honk the klaxon
Crypto
Medium
63 solves
25
colza
voyage
Misc
Easy🌱
126 solves
26
rsk0315
Decimal float 101.0
Misc
Medium
72 solves
27
bubububu
Style Your Alpaca
Web
Hard
62 solves
28
pppp4649pppp4649
Only forward
Pwn
Hard
76 solves
29
tchentchen
Nano Services
Web
Medium
96 solves
30
minaminaominaminao
Super Short System Exit
Misc
Medium
93 solves
1
admin
Alpaca Nation
Misc
Welcome🌱
316 solves
2
hiikunzhiikunz
Flag is A+B
Crypto
Easy🌱
216 solves
3
tchentchen
Lucky Redirect
Web
Easy🌱
186 solves
4
hiikunzhiikunz
Renda
Rev
Medium
137 solves
5
tchentchen
IP Blocked Secret
Web
Hard
74 solves

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