Large-Scale Abuse of Contact Discovery in Mobile Messengers [pdf]

• Synapse

  367 11,720 9.8 Python

  Discontinued Synapse: Matrix homeserver written in Python/Twisted.

  

Matrix lets you configure the history retention on a per-server or per-room basis, fwiw: https://github.com/matrix-org/synapse/blob/develop/docs/mess.... From a metadata perspective, we're working on P2P to avoid metadata accumulating on servers. In terms of the OP here (address-book based contact discovery), https://github.com/matrix-org/matrix-doc/blob/hs/hash-identi... is how Matrix optionally implements it while trying to preserve privacy.

• matrix-doc

  71 749 9.5 HTML

  Discontinued Proposals for changes to the matrix specification [Moved to: https://github.com/matrix-org/matrix-spec-proposals]

  

Matrix lets you configure the history retention on a per-server or per-room basis, fwiw: https://github.com/matrix-org/synapse/blob/develop/docs/mess.... From a metadata perspective, we're working on P2P to avoid metadata accumulating on servers. In terms of the OP here (address-book based contact discovery), https://github.com/matrix-org/matrix-doc/blob/hs/hash-identi... is how Matrix optionally implements it while trying to preserve privacy.

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• dendrite

  42 5,392 9.0 Go

  Dendrite is a second-generation Matrix homeserver written in Go!

  

That's changing. Dendrite [1] is the official next-generation server implementation and optionally supports decentralization.

But due to the usability constraints of truly decentralized systems, I think most users are better off with federation.

[1] https://github.com/matrix-org/dendrite

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