'''''Rich Communication Services''''' ('''RCS''') er en [[kommunikationsprotokol]] mellem mobiltelefonudbydere og mellem [[mobiltelefon]] og [[teleoperatør]], der sigter mod at erstatte [[Short Message Service|SMS]]-beskeder med et tekstbeskedsystem, der er rigere, giver telefonbogs-polling (til serviceopdagelse) og kan sende multimedie under opkald. Det er en del af det bredere ''[[IP Multimedia Subsystem]]''. Google har tilføjet understøttelse af end-to-end-[[kryptering]] for alle [[chat]]s i deres egen RCS-baserede app, [[Messages]].<ref name=":13">{{Cite web |last=Bohn |first=Dieter |date=19. november 2020 |title=Google is rolling out end-to-end encryption for RCS in Android Messages beta |url=https://www.theverge.com/platform/amp/2020/11/19/21574451/android-rcs-encryption-message-end-to-end-beta |access-date=28. november 2020 |website=The Verge |publisher=Vox Media, Inc.}}</ref><ref name=":22">{{Cite report |url=https://www.gstatic.com/messages/papers/messages_e2ee.pdf |title=Technical Paper: Messages End-to-End Encryption Overview - |last=Omara |first=Emad |date=juni 2021 |website=gstatic.com |version=1.1}}</ref><ref name=":42">{{Cite web |title=Google Messages Gets End-to-End Encryption for Group Chats on Android |url=https://www.pcmag.com/news/google-messages-gets-end-to-end-encryption-for-group-chats-on-android |access-date=2022-12-02 |website=PCMAG |language=en}}</ref><ref name=":52">{{Cite web |last=Li |first=Abner |date=2022-12-02 |title=Google Messages starts rolling out end-to-end encryption (E2EE) for group chats in beta |url=https://9to5google.com/2022/12/02/google-messages-group-encryption/ |access-date=2022-12-02 |website=9to5Google |language=en-US}}</ref>
Kommunikation