MeshBay — read-only public mirror https://git.meshbay.org/meshbay.git/atom?h=0.1 2026-08-09T03:27:16Z 2026-08-09T03:27:16Z Christophe Besson cbesson@gmail.com 2026-08-09T03:27:16Z urn:sha1:cb6e33a2c82a2f61712c3418c156b1ef3e12aaf4 RatchetState: full Signal-spec Double Ratchet (DH ratchet + symmetric ratchet). KDF_RK/KDF_CK via HKDF-SHA256. AES-256-GCM message encryption. MKSKIP for out-of-order delivery (max 1000 skipped keys). ChatMessage dataclass with to_dict/from_dict for wire serialisation. Properties validated by tests: ✓ Forward secrecy (consumed keys unreplayable) ✓ Out-of-order delivery ✓ Associated data binding ✓ Break-in recovery (post-ratchet keys independent) ✓ 100-message stress test 11/11 tests in 0.06s. Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>