Google is experimenting with Multi-Device Standard (MLS) encryption for RCS messaging and redesigning its details page within the Google Messages application.
In a significant move towards enhancing the security of messaging services, Google has started testing the Messaging Layer Security (MLS) protocol for end-to-end encryption (E2EE) in Rich Communication Services (RCS) within its Google Messages app. This rollout is part of a broader industry push to make RCS a secure universal alternative to SMS, with Apple also planning to support encrypted RCS messaging, although a specific timeline for Apple's support remains unclear [1][2][3].
The testing phase includes a revamped "Details" page in Google Messages, accessible via long-press on a message, which shows the MLS encryption status along with message delivery indicators. However, this feature is currently limited to a testing phase and has not yet reached wide availability across all users [1].
As Google is known for its meticulous testing before stable releases, a wide rollout of MLS encryption in Google Messages is not yet complete but is expected to expand gradually in the near future. The ongoing adoption by Apple and the GSMA's official incorporation of MLS in RCS standards suggest broader adoption later in 2025 or beyond, once interoperability and user experience are fully refined [1][2].
The new MLS encryption in RCS uses a single circle design, which is yet to become widely available. The Universal Profile 3.0, an update that adds support for MLS, enables E2EE across different RCS clients and providers.
In addition to the MLS encryption, the new "Details" screen in Google Messages also includes a "From" section and a "Status" section that explains the new checkmarks for "Sent" and "Delivered". The bottom portion of the new "Details" screen provides more technical details about the MLS encryption implementation in Google Messages.
The specifics of the MLS encryption implementation in Google Messages are not yet widely known. It is also unclear if the MLS design rollout in Google Messages follows the same pattern as the old UI.
This cautious rollout aligns with the industry's goal to make RCS the new secure messaging standard across platforms [1][2][3]. As the testing phase progresses and the protocol and cross-platform support mature, users can look forward to a more secure messaging experience with RCS.
[1] 9to5Google (2025). Google begins testing MLS encryption for RCS in Google Messages. [online] Available at: https://9to5google.com/2025/07/01/google-mls-encryption-rcs-google-messages/
[2] The Verge (2023). Google and Apple are bringing end-to-end encryption to RCS messaging. [online] Available at: https://www.theverge.com/2023/3/15/22610200/google-apple-rcs-messaging-end-to-end-encryption-mls-protocol
[3] Wired (2025). The RCS Messaging Protocol Could Finally Be Ready for Prime Time. [online] Available at: https://www.wired.com/story/rcs-messaging-protocol-google-apple-end-to-end-encryption/
Data-and-cloud-computing technology plays a crucial role in the implementation of the Messaging Layer Security (MLS) encryption in Google Messages, as it allows for the secure and efficient management of encryption keys and data.
With the industry's push towards making Rich Communication Services (RCS) a secure universal alternative to SMS, the adoption of technology such as data-and-cloud-computing is essential for ensuring the success and scalability of the MLS encryption implementation in RCS messaging services.
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