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Chronicle/Defense & research

TTCP releases CAGE Challenge 4, a multi-agent autonomous cyber defence environment

DefenseCompetitionSignificance assistant-drafted

CAGE Challenge 4, run under The Technical Cooperation Program, asks entrants to build five cooperating blue-team agents that defend a segmented fictional military network against randomized red agents while green agents generate legitimate activity. The challenge ran from February to May 2024 in the CybORG simulator, scored by mean reward over 100 randomized 500-step episodes, and the environment remains public.

Why it matters

CAGE 4 is a shared, reproducible environment that later work, including LLM-agent defenders, uses to compare defensive agents.

Key facts

As stated in the sources, with where to find them.

  • Timeline: challenge released 20 February 2024, competition phase opened 29 March 2024, closed 10 May 2024.README, release timeline
  • Five blue agents defend separate zones with restricted inter-agent communication; submissions are ranked by mean reward across 100 randomized 500-timestep episodes.README, scenario and evaluation sections

Findings that cite this record

No tracked finding cites this record yet.

Sources

  • cage-challenge-4CAGE Challenge (GitHub)Feb 20, 2024Primary sourceAccessed Sep 25, 2026

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