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About CISS 2025

Critical Infrastructure Security Showdown 2025 (CISS 2025) is a premier and one-of-its-kind cyber exercise in operational technology. This international exercise is held entirely remotely and opened to invited international participants. CISS 2025 is sponsored by the Cyber Security Agency of Singapore and co-organised with the Ministry of Defence, Singapore.

The 9th iteration of CISS 2025 returns with a familiar modality and added features: 

  1. Two-stage competition: Qualifying Round (48-hour CTF) + Finals: “Live” testbed access (4 hours)
  2. CTF challenge contributions by more local and international collaborators
  3. Hybrid platforms: OT physical testbeds and cyber twins
  4. Mystery platform
  5. Live scoreboard
  6. No cap on number of teams per organisation, though each team will still be limited to 8 persons
  7. Increased cash prize for top 3 finalists: S$5,000 / S$3,000 / S$2,000

CISS 2025 Finals Results

TBC

Updates

  • 29 May: 15 Red Teams have signed up
  • 14 May: CISS 2025 info page created

 

Access to world’s largest interconnected industrial-grade critical infrastructure playground

A novel and complex OT system awaits participants of CISS 2023

 

Important dates (subject to changes)

Registration for CISS 2025

Red Teams can form up to 8 members per team and there is no cap on the number of teams per organisation.
Please register here by 1 Jul 2025!

Prizes

The top 3 Red Teams stand to win attractive cash and novelty prizes!

1st prize: S$5,000
2nd prize: S$3,000
3rd prize: S$2,000

29 Sep 2025
Countdown to CISS 2025
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Past CISS Red Teams (selected)

Sponsoring Partners

Please contact itrust@sutd.edu.sg for sponsorship opportunities. 

CISS News & Event Gallery

CISS2023 Award Ceremony

CISS2023 Opening Ceremony

CISS2022 Award Ceremony

CISS2022 Opening Ceremony

CISS2021-OL Opening Ceremony

CISS2020 Award Ceremony

CISS2021 Award Ceremony

CISS2020-OL Opening Ceremony

CISS2019