Is it possible to design a (pen and paper) cipher that is secure against government cryptanalysis for at least 10 years? - eviltoast

I know theres AES and PGP, but all electronics stuff still has backdoors. You can’t backdoor a piece of paper and a writing utensil.

  • Inucune@lemmy.world
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    2 days ago

    Book cypher. 2 copies of the exact same book. The cypher is an agreed upon system of indicating letters or words.