Gemini 4 Carbon generates 6M lines of Lean proofs to formally verify Signal protocol code
sundarpichai · x · 2026-11-11
Sundar Pichai announced Google DeepMind's AlphaProof Code framework formally verified the Signal protocol's underlying code down to compiled device code — the first time any method has verified such a widely deployed cryptographic protocol implementation.
- Gemini 4 Carbon generated 6M+ lines of machine-checked Lean proofs, compressing years of expert work into weeks
- Only 1% of the codebase required human review; Lean auto-checked the rest
- Results will be open sourced for the security community
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