Cross-signing is basically there at the SDK & server level; just needs the UX to be added into Riot, but we prioritised https://matrix.org/blog/2019/06/30/tight

Cross-signing is basically there at the SDK & server level; just needs the UX to be added into Riot, but we prioritised https://matrix.org/blog/2019/06/30/tightening-up-privacy-in-matrix/ https://matrix.org/blog/2019/06/30/tightening-up-privacy-in-... so running a few weeks behind. E2E search is entire client-side, and works thanks to https://github.com/matrix-org/pantalaimon/tree/search https://github.com/matrix-org/pantalaimon/tree/search. We're not doing homomorphic stuff; instead we're thinking about encrypting the tantivy indexes and storing them serverside.