End-to-end encryption is still in the draft phase in terms of the Matrix specification—there hasn't yet been a published version of the spec that includes it. S

End-to-end encryption is still in the draft phase in terms of the Matrix specification—there hasn't yet been a published version of the spec that includes it. Synapse, the reference homeserver implementation, and Vector, the premiere web client, are still developing the implementation and will be deploying it sometime soon, likely followed by a new version of the spec that formalizes it. The documents I know of that provide details about it are here: * https://matrix.org/jira/browse/SPEC-162 https://matrix.org/jira/browse/SPEC-162 (the tracking issue for the feature in Matrix's issue tracker) * https://matrix.org/git/olm https://matrix.org/git/olm (C implementation of the protocol formerly known as axolotl v2 developed for use in Matrix) * https://matrix.org/speculator/spec/drafts%2Fe2e/client_server/unstable.html#end-to-end-encryption https://matrix.org/speculator/spec/drafts%2Fe2e/client_serve... (draft of the spec for E2E)