Enlarge / Security padlock in circuit-board background. (credit: Getty Images | Yuichiro Chino)

Abbreviated as RCS, Rich Communication Service provides a, well, richer user experience than the ancient SMS standard. Typing indicators, presence information, location sharing, longer messages, and better media support are key selling points. They lead to things like better-quality photos and videos, chat over Wi-Fi, knowing when a message is read, sharing reactions, and better capabilities for group chats. As Ars Review Editor Ron Amadeo noted last year, RCS interest from carriers has been tepid, so Google has been rolling it out with limited support.

Google said on Thursday that it has now completed its worldwide rollout of RCS and is moving to a new phase—end-to-end encryption. Interest in end-to-end encryption has mushroomed over the past decade, particularly with revelations from Edward Snowden of indiscriminate spying of electronic communications by the NSA.