AlphaProof Code

Google DeepMind researchers used AlphaProof Code, a novel AI-powered framework, to formally verify the security of Signal's cryptographic protocol—the technology protecting billions of private messages—marking the first time AI has mathematically proven a widely deployed cryptographic protocol's implementation at this depth. The multi-LLM system combined human expertise with AI agents to generate over six million lines of formal proof code, completing a task that traditionally takes expert teams years in just four weeks. This breakthrough demonstrates AI's capability to dramatically accelerate formal verification, the highest standard of security assurance for software.