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Google DeepMind says AlphaProof Code formally verified Signal’s libsignal

Aiden Reed November 11, 2026 AI Company News 0 Comments

On a deep merlot field, a machined gunmetal-and-copper double-ratchet with abstract, illegible machine-code texture feeds a diamond lattice of beveled proof-step tiles, many of them locked to a luminous emerald green. Below left, a cream disc carries the official Signal mark in ultramarine; below right, a cream disc carries the official Google DeepMind mark in blue.

Google DeepMind said Tuesday that AlphaProof Code formally verified key security properties of Signal’s libsignal, including the PQXDH handshake and Triple Ratchet, down to compiled…