• Apple’s encrypted RCS messaging implementation creates a new battleground as UK government seeks ‘backdoor’ access.
• Government’s closed-door legal battle with Apple over encryption highlights broader privacy tensions.

Encrypted RCS messaging is coming to Apple devices soon, potentially creating a new flashpoint in the ongoing tension between technology companies and governments seeking backdoor access to user communications.

On March 14, 2025, Apple announced that it would “add support for end-to-end encrypted RCS messages to iOS, iPadOS, macOS, and watchOS in future software updates,” signalling a significant shift in cross-platform messaging security.

The development comes at a particularly sensitive time. Apple is currently in a closed-door legal battle with the UK government over encryption access to its Advanced Data Protection service. The timing of the RCS announcement raises questions about how Apple will navigate conflicting demands for enhanced user privacy and demands from governments’ surveillance abilities.

The technical breakthrough

The GSM Association (GSMA) recently updated its Rich Communication Services (RCS) specifications to include end-to-end encryption (E2EE) based on the Messaging Layer Security (MLS) protocol.

According to the GSMA, this specification enables “interoperable encryption between different platform providers for the first time.” Tom Van Pelt, Technical Director of GSMA, explained the significance:

“RCS will be the first large-scale messaging service to support interoperable E2EE between client implementations from different providers. With other unique security features like SIM-based authentication, E2EE will provide RCS users with the highest level of privacy and security.”

Until now, cross-platform messaging between iOS and Android devices lacked the security of end-to-end encryption. While Apple’s iMessage and Google’s implementation of RCS already supports E2EE in their respective ecosystems, such protections disappeared when messages crossed platforms.

Apple spokesperson Shane Bauer highlighted the company’s role in the development: “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.”

Google also expressed its enthusiasm for the advancement of cross-platform E2EE, with spokesperson Ed Fernandez telling The Verge: “We’re excited to have this updated specification from GSMA and [will] work as quickly as possible with the mobile ecosystem to implement and extend this important user protection to cross-platform RCS messaging.”

Collision course with government demands

The encrypted RCS announcement comes amid escalating tensions between Apple and the UK government over access to encrypted data. On March 14, 2025 – the same day as Apple’s RCS announcement – a hearing in Apple’s legal challenge against the UK Home Office was held behind closed doors at the Royal Courts of Justice. The dispute centres on a technology capability notice issued under the Investigatory Powers Act, demanding Apple provide access to encrypted data stored in its cloud servers.

Apple challenged the order and withdrew its Advanced Data Protection (ADP) service from the UK last month, stating: “We have never built a backdoor or master key to any of our products or services, and we never will.”

The timing of Apple’s encrypted RCS announcement alongside its UK legal challenge suggests the company is taking a combative approach to strengthening encryption across its platforms despite government pressure. This creates a dilemma for UK authorities, that may soon face another encrypted communication channel potentially beyond their legislative reach.

Global Implications

The ongoing matter has drawn international attention. A bipartisan group of US lawmakers has called on the UK tribunal to “remove the cloak of secrecy” around the government’s order and publicise the court proceedings. Bloomberg reported that British officials have initiated talks with their US counterparts, assuring them that they are “not seeking blanket access and would only seek data related to serious crimes like terrorism and child sexual abuse.” However, privacy advocates remain concerned about any precedent that might undermine encryption protections.

The future of cross-platform privacy

The implementation of encrypted RCS represents a significant advance in user privacy. E2EE prevents third parties – including messaging providers, cell carriers, and potentially governments – from viewing message content. For everyday users, conversations between iPhone and Android devices will finally enjoy the same protection already available inside individual OS platforms (iOS and Android). The GSMA’s adoption of the MLS protocol provides a standardised encryption approach that could be extended to other communication services. However, the timeline for Apple’s implementation remains unclear: The company has only committed to supporting the feature in “future software updates” without specifying when these updates will arrive.

The balancing act

Apple now balances competing priorities: enhancing user privacy through initiatives like encrypted RCS, and the navigation of legal challenges from governments seeking surveillance capabilities for law enforcement. The UK case could establish a precedent for encryption policies worldwide. If the UK government succeeds in gaining access to encrypted communications, other countries might follow suit with similar demands. The outcome of Apple’s proposed encrypted RCS rollout and its UK legal battle will have lasting implications for digital privacy.