rolling their own crypto
No, it uses well-known, well-proven, standard crypto.
It also uses double-ratchet key management, much like what Signal does.
The reference server is a bit heavy if you're federating with large public rooms, but lighter alternative servers are available.
they do have a special crypto usage which they have sensibly rewritten in Matrix 2.0
This is a most excellent place for technology news and articles.
No, it uses well-known, well-proven, standard crypto.
It also uses double-ratchet key management, much like what Signal does.
The reference server is a bit heavy if you're federating with large public rooms, but lighter alternative servers are available.
they do have a special crypto usage which they have sensibly rewritten in Matrix 2.0