rowanthorpe

joined 2 years ago
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Is it possible to design a (pen and paper) cipher that is secure against government cryptanalysis for at least 10 years? in c/nostupidquestions@lemmy.world
[–] rowanthorpe@lemmy.ml 5 points 1 week ago

In-band periodic key-exchange. Pre-arrange that keys expire every X messages, and that the last (Xth) message is dedicated to sending the new key encrypted by the previous one.