this post was submitted on 04 Aug 2021
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Privacy

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[โ€“] [email protected] 2 points 3 years ago (1 children)

Snail-mailing a handwritten note to your friend in a secret code that only the both of you know.

[โ€“] [email protected] 2 points 3 years ago* (last edited 3 years ago)

that doesn't hide metadata, the postal service can track it and you can trace back both the handwriting and reverse engineer the code. Someone can intercept the mail from many stations on the way, including your own post box.

I'd say that many messaging services offer more protection than that method.

You could, however, use PGP with elliptic curve cryptography, and send that via packet radio or something similar on a frequency only you know. To an uninvited person this only looks like garbage data or noise.