I think XMPP.

  • jhghjb (he/they)@lemmy.ml
    link
    fedilink
    arrow-up
    3
    arrow-down
    2
    ·
    3 years ago

    xmpp encrypts everything, metadata included

    it’s not easy and makes the protocol really hard to implement but it is possible

    • poVoq@lemmy.ml
      link
      fedilink
      arrow-up
      5
      ·
      edit-2
      3 years ago

      Hmm, sadly that isn’t the case, a lot of metadata on XMPP is also exchanged only TLS transport encrypted and is thus available on the server in clear text. The main difference to Matrix is that it generates and exchanges much less metadata and most XMPP servers are configured to delete all the metadata after a relatively short period of time.