DeepMind's AlphaProof Code formally verifies Signal protocol with 6M lines of Lean proofs
kjgeras · x · 2026-11-11
Google DeepMind used its new AlphaProof Code framework to formally verify a real-world implementation of the Signal cryptographic protocol down to compiled machine code. Gemini 4 Carbon generated 6M+ machine-checked Lean proof lines, compressing years of expert verification into weeks; only 1% of the codebase needed human review. Results are being open-sourced, aiming to shift the advantage to defenders in secure software.
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