There is no such thing as a back door
This is math. Numbers don’t lie
A back door for one is a back door for all and any back doors for specific governments will eventually be decrypted, rendering the encryption useless for everyone
Liked the comment because ot its honesty & intention, but some parts can be discussed, such as:
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A back door for one is a back door for all
Not quite. You can even implement selective backdoors in plain sight by carefully picking constants in an algorithm, with proven advantage to designer only. Other practices include:
- hide unreleased attacks (very dangerous as they can be discovered independantly)
- set unsafe default parameters (will apply in most implementations)
- exploit protocol flaws around algorithms (quietly add _YourFriendFromAgencyXXX_ to group discussions)
- soften up implementations to get forensic or remote key access
NSA/NIST has an extensive record of such practice, to the point that crypto scientists (encryption, not bitcoins) published simpler, clearer and honest algorithms (like the WireGuard suite).
Nowadays, even democraties challenge the right to private communication. They claim it must be forfeited in order to fight crime & terrorism. Among the risks: (1) collusion of state powers and political agendas with tech interests, and (2) listening to the whole population (innocent & culprits alike) for even better efficiency, Pre-Crime style.