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.
In brief, it’s a complicated jumble. That is one motive why alternate options equivalent to WhatsApp and Sign, each of which additionally use the Sign protocol, have develop into so widespread; you get E2EE out of the field with out compatibility worries, they usually enable 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 variety of superior options together with giant teams, that are crucial for companies which want many-to-many communication. Proper now, if even one person 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 commonplace to goal for.
