About TISC

The InfoSecurity Challenge

One Target Remains

TISC returns September 2026.

Are you ready to prove your mettle? One target remains.

Defeat The Singularity.

Overview

TISC is a Capture-the-Flag (CTF) competition organised by CSIT since 2020. It provides opportunities for Singaporeans to put their cybersecurity and programming skills to the test by solving challenging puzzles against the clock.

TISC is an individual competition, with participants completing a series of challenges, sequentially, that increase in difficulty. These challenges will cover various topics including, but not limited to, Web Penetration, Forensics, Reverse Engineering, Binary Exploitation, Cryptography, Mobile, Cloud and OSINT.

Not every flag in 2026 will be captured the traditional way. Expect the unexpected — we’re cooking up something different this year.

Participation

TISC is open to Singapore citizens only.

CSIT employees and seconded staff to/from CSIT are not eligible to participate.

Check out the Terms and Conditions of participation here.

Why should you participate in TISC?

TISC is an individual challenge. Top players will have the opportunity to win cash prizes.

Digital badge of completion. Participants will be awarded a digital badge that corresponds to the highest level completed. The digital badge may be shared on social media.

Digital badge of participation. Participants who complete at least one challenge will receive the digital badge of participation as a memento of your participation in TISC.

TISC Swag. Top players will receive exclusive Swag. In 2025, the top 50 participants received a customised TISC keycap and T-shirt.

If you prefer to create challenges to push the limits of your cyber peers, participate as a challenge creator instead! Selected challenges will earn a S$1,000 reward.

Frequently Asked Questions

Check out our FAQs here.

Past Year Highlights

TISC 2025

More than 1,300 cybersecurity experts answered the call in TISC 2025 to locate the core of the kingpin over an exciting 16-day journey.

New to TISC? Find out more about TISC 2025’s storyline here. 

TISC@DEF CON SG1

A special edition TISC@ DEFCON was organised in Mar 2026 which culminated in TISC's first-ever onsite finals at DEFCON SG1!

Learn more about the event here.

Contact Us

If you have any other enquiries (bugs, write-ups etc), you can contact us at tisc_contactus@csit.gov.sg.