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Samsung joins Google in RCS shaming Apple
(www.theverge.com)
This is a most excellent place for technology news and articles.
There are mandated back doors in most message apps. Messages between different message systems are normally harder to read
Source?
RCS has an e2e encryption extension (created by Google)
All currently available RCS implementations are proprietary, you can't trust the encryption if you can't verify it.
Except the commenter above is talking about SMS/MMS which is not encrypted and very easy for a government to snoop on via the telecom company. You have no protections.