iPhone and Android users will be able to exchange end-to-end encrypted (E2EE) RCS messages in the near future thanks to newly updated RCS specifications. The GSM Association announced that the latest RCS standard includes E2EE based on the Messaging Layer Security (MLS) protocol, enabling interoperable encryption between different platform providers for the first time.
The GSM Association said it had started working to enable E2EE on messages sent between Android and iPhone in September last year. E2EE is a privacy and security feature that prevents third parties, such as messaging providers or cell carriers, from viewing the content of your texts. The GSMA says the new RCS standard was developed in collaboration with “mobile operators, device manufacturers, and technology providers,” including Apple.
“End-to-end encryption is a powerful privacy and security technology that iMessage has supported since the beginning, and now we are pleased to have helped lead a cross industry effort to bring end-to-end encryption to the RCS Universal Profile published by the GSMA,” said Apple spokesperson Shane Bauer. “We will add support for end-to-end encrypted RCS messages to iOS, iPadOS, macOS, and watchOS in future software updates.”
Apple introduced RCS support to iPhones as part of an iOS 18 update in September. While Apple’s proprietary iMessage system already supported E2EE, this wasn’t extended to RCS messaging because the previous RCS standard didn’t provide cross-platform support. Google Messages also enabled E2EE by default for RCS texts, but only conversations between Google Messages users were E2EE, and not those exchanged with iMessage users or users of other RCS clients on Android.
