Google is testing a major iMessage feature for RCS

, it appears that Google has plans to add end-to-end encryption for its text message replacement, Rich Communication Services (RCS). Last year Google finished rolling out RCS in the U.S.; because it sends messages over data networks instead of cellular, messages can be sent over Wi-Fi. It also allows users to type as many as 8,000 characters per message (up from 160) and makes it easier to share large image and video files. RCS also provides a read receipt showing that the party receiving the message has opened it, and also shows when a reply to a message is being typed out.

While …