The result’s that if you wish to ship a safe RCS message between Android units, you might want 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.
Briefly, it’s a complicated jumble. That is one motive why alternate options reminiscent of WhatsApp and Sign, each of which additionally use the Sign protocol, have turn out to be so well-liked; you get E2EE out of the field with out compatibility worries, and so they permit teams of as much as 1,024 members.
Having a single protocol, MLS, protecting E2EE adjustments the story. Now RCS with MLS can supply a spread of superior options together with giant teams, that are vital for companies which want many-to-many communication. Proper now, if even one consumer in a gaggle is utilizing an RCS app with out appropriate E2EE, the security of the entire group chat may be compromised. MLS offers each app maker one IETF normal to purpose for.
