The result’s that if you wish to ship a safe RCS message between Android gadgets, you have to use Google’s personal Messages app at each ends; it implements E2EE utilizing the well-worn Sign protocol. Equally, Apple adopted RCS in iMessage final yr, however with a proprietary implementation of E2EE.
In brief, it’s a complicated jumble. That is one motive why alternate options comparable to WhatsApp and Sign, each of which additionally use the Sign protocol, have turn out to be so standard; you get E2EE out of the field with out compatibility worries, they usually permit teams of as much as 1,024 members.
Having a single protocol, MLS, overlaying E2EE modifications the story. Now RCS with MLS can provide a spread of superior options together with massive teams, that are important for companies which want many-to-many communication. Proper now, if even one consumer in a gaggle is utilizing an RCS app with out suitable E2EE, the safety of the entire group chat may be compromised. MLS offers each app maker one IETF customary to intention for.
