Next event: Jingle Shells 2025 View event

Jingle Shells 2025

Australia wide Christmas CTF. Built by students, for students.

36 hours online Free to join Beginner friendly to advanced
Register free Join the Discord
Event starts in:
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Why join

Learn fast

Short, practical challenges across web, OSINT, crypto, reversing, forensics.

Meet people

Team up with students across Australia.

Boost your resume

Write ups and real experience.

How it works

1

Register

2

Join Discord

3

Play for 24 hours

4

Wrap up

Beginner route

New to CTFs? Start with our starter guide.

Get started

Schedule

Start
DD Mon 2025, 12:00 AEDT
Finish
DD Mon 2025, 12:00 AEDT

Register for Jingle Shells

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Teaser micro challenge

Warm-up Challenge

What's the most common password in the world? (Hint: it's not 'password')

ACUCyS Member Clubs

Thanks to our partners

Frequently Asked Questions