CISS 2025

8 July: 47 Red Teams have signed up; Discord server set up
2 July: Briefing for Red Teams will be on 22 July (1600, GMT +8); Red Team leaders and their deputies will receive an email with Zoom meeting invite
28 June: 42 Red Teams have signed up
24 June: Deadline for registration has been extended to 13 Jul 2025
20 June: 27 Red Teams have signed up
29 May: 15 Red Teams have signed up
14 May: CISS 2025 info page created

Organised by		Supported by

Challenge Contributors

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:

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