Sadly not true......but actually not the point!!
@Lotaresco
The point about a private citizen (or private citizens) using private encryption is NOT "perfect secrecy".
If we use private encryption BEFORE A MESSAGE ENTERS ANY PUBLIC CHANNEL, the snoops are given three challenges, not one:
(1) How to break the public service encryption (Proton, WhatsApp, etc)
(2) ...then how to determine what private encryption scheme has been used (AES, SALSA, chacha....maybe a private book cipher)
(3) ...and then what key might have been used in item #2
By the way, if item #2 is arranged to use a different random key for each message (see Diffie/Helman), the task is much harder than if say, PGP or similar was in use.
The point is that well designed private encryption slows the snoopers down!! Perhaps by a lot!!
Your comment implies that we citizens are weak, and have no recourse against large private (or state sponsored) snooping. Perhaps this is not true. If our messaging takes, say, a year for snoopers to read......then the message has been private for LONG ENOUGH!!
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