Replying to Avatar Derek Ross

Your RCS conversations are now fully end-to-end encrypted

https://support.google.com/messages/thread/229405182/your-rcs-conversations-are-now-fully-end-to-end-encrypted

"RCS is the modern industry standard for dynamic and secure messaging. And now, all of your RCS conversations in Messages by Google are end-to-end encrypted, including group chats, which keeps them private between you and the people you’re messaging.

To ensure more people benefit from this added security, RCS will now be enabled by default for new and existing users*, unless they’ve previously turned RCS off in Settings. You can always turn RCS on or off in Settings at any time."

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Vlady 2y ago

If you are not the one who is managing the encryption keys it is not a secure end to end messaging. For example matrix synapse, keys are only on the client device, can be exported as a backup. But without them not even the server knows what messages are about. With rcs doesn't look like you are in control of the keys. Not your keys....

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schoper 2y ago

The keys on Matrix are for encrypting the user chats stored on the server for an indefinite amount of time

In RCS, messages are just delivered ASAP, not stored on the server

Both are end to end encrypted