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End-to-End Encryption for RCS, enabling Secure Cross-Platform Messaging.

Text messages sent between iOS & Android devices will soon benefit from end-to-end encryption, after the GSM Association published new specifications for the RCS protocol that include support for cross-platform E2EE.

https://www.gsma.com/solutions-and-impact/technologies/networks/gsma_resources/gsma-rcs-universal-profile-3-0-specifications/

#ios #android #rcs #protocol #it #security #privacy #engineer #media #tech #news
The new GSMA specifications for RCS include E2EE based on the Messaging Layer Security [MLS] protocol via what's called the Rich Communication Services [RCS] Universal Profile 3.0.

"The new specifications define how to apply MLS within the context of RCS," Tom Van Pelt, technical director of GSMA, said. "These procedures ensure that messages and other content such as files remain confidential and secure as they travel between clients."

<https://www.gsma.com/newsroom/article/rcs-encryption-a-leap-towards-secure-and-interoperable-messaging/>

This also means that RCS will be the first "large-scale messaging service" to have support for interoperable E2EE between different client implementations from different providers in the near future.

The development comes nearly six months after the GSMA said it was working towards implementing end-to-end encryption [E2EE] to secure messages sent between the Android and iOS ecosystems. The move followed Apple's decision to roll out support for RCS in its own Messages app with iOS 18.

Google said, "We've always been committed to providing a secure messaging experience, and Google Messages users have had end-to-end encrypted [E2EE] RCS messaging for years. We're excited to have this updated specification from GSMA and work as quickly as possible with the mobile ecosystem to implement and extend this important user protection to cross-platform RCS messaging."