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About CISS 2023

Critical Infrastructure Security Showdown 2023 (CISS 2023) 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 2023 is sponsored by the Cyber Security Agency of Singapore and co-organised with the Ministry of Defence, Singapore.

Theme: Let OT Reign

The 7th iteration of CISS 2023 returns with the following bumper list of exciting additions:

  1. 48-hour CTF-style Stage 1: 20 challenges involving PLCs, digital twin, and a live scoreboard
  2. In additional to SWaT, WaDi and EPIC testbeds, a gas pipeline testbed will be added
  3. Additional datasets from network for network forensics and familiarisation
  4. More attack objectives, including an Open Category
  5. Novelty prizes

Exercise Documentation

CISS 2023 Finals Results

  1. Undecided

Congratulations! Download the report here.

CISS 2023 Stage 1


  • The 48-hour Stage 1 CTF will be conducted remotely. You will only need your laptops. Connection details will be shared at the briefing.
  • Challenge categories will be ICS (industrial control system) centric. (e.g. ICS protocols, PLC code, etc).
  • Main mode of communication will be through Discord. Please create an account if you do not already have one. Discord server will be shared at Stage 1 briefing.
  • Results of Stage 1 (in no order of merit):
  1. 404 APT Not Found
  2. ADFCSA2
  3. Axe
  4. Bristol Cyber Security Group
8. Shellcode for Cereal
9. Undecided
10. UncleCY
11. Yolosw4g



  • 20 Feb: CISS Report is available for download here
  • 28 Aug: CISS Awards and Closing Ceremony can be viewed here
  • 17 Aug: CISS Opening Ceremony can be viewed here
  • 21 Jul: Briefing slides and video for Finals can now be accessed. Refer to Exercise Documentation
  • 6 Jul: Briefing slides and video for Stage 1 can now be accessed. Refer to Exercise Documentation
  • 4 Jul: Schedule table updated
  • 13 Jun: Briefing for IDS Teams is on 16 Jun, 1300 – 1400. Briefing slides and video can now be accessed. Refer to Exercise Documentation
  • 13 Jun: Briefing for Stage 1 for Red Teams is on 6 July, 1600 – 1800
  • 12 Jun: Registration for CISS has closed and 35 organisations (42 red teams) have signed up for CISS 2023!
  • 9 Jun: 27 red teams have signed up for CISS 2023!
  • 9 Jun: Schedule table updated
  • 7 Jun: Finals dates are confirmed as 18 Aug, 21-24 Aug
  • 1 Jun: Red Teams can now send up to 8 members per team
  • 26 May: 22 red teams have signed up for CISS 2023!
  • 22 May: 16 red teams have signed up for CISS 2023!
  • 22 May: CISS 2023 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)

RT = Red Teams; IDS = Intrusion Detection System Teams

Registration for CISS 2023

Participation in this exclusive and unique exercise is by invitation only. Invited Red Teams can form up to 8 members per team and up to 2 teams per organisation. Keep a look out for our invitation in your inbox!


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

1st prize: S$4,000
2nd prize: S$2,000
3rd prize: S$1,000

18 Aug 2023
Countdown to CISS 2023


Organising Committee

Exercise Directing: Prof Aditya MATHUR, Prof Jianying ZHOU, TAN Shengyang
White Team Lead: William TEO
Organising Secretariats: Benedict TAN, Mark GOH
Judges: William TEO, Delaney NG, Matthias YEO, Rong Hwa CHONG
Green Team: Francisco FURTADO (Lead), Jonathan TAY, Andrew TAY, R Aanand
Tech Writers: Tiger LIM, TEO Xu Kai, TEO You Xiang, Jason KOO, MOHD Rian
Rules of Engagement and Scoring: Francisco FURTADO, Jonathan TAY
Detector Analysts: Ivan CHRISTIAN (Lead), Dr Gauthama RAMAN, Andy TAY, Nagarajan SIVANADIPATHAM
CISS Stage 1 Support: Mavis ANG, Felix WONG, Dr LIU Yuancheng, Hannah OEI

Past CISS Red Teams (selected)

Sponsoring Partners

Please contact 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