DeepMind's AlphaProof Code formally verifies Signal crypto with 6M lines of Lean in 4 weeks
dl_weekly · x · 2026-11-15
Google DeepMind introduced AlphaProof Code, a multi-LLM agentic framework for deep formal verification. In a first, AI agents (powered by Gemini Carbon) mathematically proved key security properties of Signal's actual cryptographic implementation — the first formal verification of a widely deployed protocol by any method. Human experts helped translate security goals into formal specs; agents generated over 6 million lines of Lean proofs in four weeks, flagging only 1% of the codebase for human review. Technical paper available.
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