DeepMind's AlphaProof Code formally verifies Signal protocol code in first
luislamb · x · 2026-11-11
Google DeepMind introduced AlphaProof Code, a multi-LLM agentic framework that formally verified the actual code of the Signal protocol, mathematically proving key security properties.
Key points:
- First time any method — with or without AI — has formally verified a widely deployed protocol implementation at this depth, a long-standing security grand challenge protecting billions of conversations in Signal and Google Messages.
- Human experts worked with models to translate Signal's security goals into formal specs, then Gemini-powered agents generated over six million lines of Lean to complete the proofs.
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