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Daily AlpacaHack

A daily CTF challenge with a fun new puzzle every day

What is Daily AlpacaHack?

We publish one simple, beginner-friendly or educational CTF challenge every day!

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Solve within 24 hours of release to appear on the leaderboard.

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Today's Challenge

Alpaca Certification

Submissions (latest 3)

SOLVED!

Jun 11, 8:07 AM

SOLVED!

Jun 11, 8:05 AM

SOLVED!

Jun 11, 7:00 AM

Leaderboard

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Try the first challenge

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

AlpacaHack 2100

Upcoming challenges reveal the , , and in advance.

Jun 2026

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Mon

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1

admin

Half-Year Recap

Misc

Welcome🌱

204 solves

2

minaminao

Cache Me If You Can

Web

Easy🌱

168 solves

3

minaminao

Misc

Medium

89 solves

4

pppp4649

Crypto

Easy🌱

114 solves

5

minaminao

Misc

Crypto

Medium

88 solves

6

nozokare

Flag for localhost

Web

Easy🌱

131 solves

7

tan90909090

C++ flag checker

Rev

Hard

75 solves

8

shiragi

Misc

Easy🌱

117 solves

9

nozokare

A Piece of DHKE

Crypto

Medium

73 solves

10

shiragi

Misc

Medium

71 solves

11

tchen

Alpaca Certification

Web

Easy🌱

81 solves

12

Planned topicFloating-Point

Misc

Medium

13

Planned topicElliptic Curve

Crypto

Hard

14

Planned topicJSON

Web

Hard

15

Planned topicHTTP/2

Web

Easy🌱

16

Planned topicPNG

Misc

Medium

17

Coming soon

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Planned topicHeap

Pwn

Hard

22

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Planned topicClient-Side

Web

Hard

28

Planned topicTBA

Pwn

Hard

29

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Rows:

Alpaca Certification

Topic: HTTPSReleased: Jun 11, 2026

81 solves

Easy🌱

by

tchen

Here's a certificate for everyone who has played Daily AlpacaHack for over half a year!

Beginner Hint

You can solve this using only your browser, which is probably the easiest way.
Alternatively, you can use the OpenSSL CLI, but the commands may be a bit complicated.

alpaca-certification.tar.gz

description solves