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

user224@lemmy.sdf.org ⁨7⁩ ⁨hours⁩ ago

• heavydust@sh.itjust.works ⁨7⁩ ⁨hours⁩ ago

  It’s a good algorithm but if you need to decode any message, you must get drunk and listen to creepy radio stations at 1AM in the forest or something.

  source
• IDKWhatUsernametoPutHereLolol@lemmy.dbzer0.com ⁨7⁩ ⁨hours⁩ ago

  Hmm yea cool, problem is, its not reusable. You have to generate new keys every time. Kinda not easy to constantly exchange new keys if you are… say a group of revolutionaries hiding from the government. 👀

  source

  • yoevli@lemmy.world ⁨7⁩ ⁨hours⁩ ago

    This is how all modern cryptography works. A deterministic cipher is functionally no different from pig Latin when it comes to actual security. A modern solution like public key cryptography is infinitely more secure. If you’re especially paranoid you can generate the cryptotext locally and send it by email; that would be infinitely more secure than anything you could achieve by hand.

    source

    • otacon239@lemmy.world ⁨5⁩ ⁨hours⁩ ago

      I would think mailing a flash drive with the key and sending the message electronically would be safer. One requires knowledge of the other.

      source
  • Nemo@slrpnk.net ⁨7⁩ ⁨hours⁩ ago

    That’s why you make a stack of them. Generate hundreds up-front and you don’t need to generate new every time.

    source

    • IDKWhatUsernametoPutHereLolol@lemmy.dbzer0.com ⁨7⁩ ⁨hours⁩ ago

      Hmm okay I was actually thinking of using this for journaling… so keeping a stack of OTP codes right next to my journal isn’y quite useful…

      gotta keep my evil plans for world domination a secret… MUAHAHAHAHA 😈

      source
  • m0darn@lemmy.ca ⁨7⁩ ⁨hours⁩ ago

    I’m certainly not an expert.

    But could you generate pads from mutually accessible data sources?

    Like use hit_me_baby_one_more_time_not_a_virus.mp3 appended with a password, as a seed in a pseudo random number generating algorithm, then do the same thing with another data source, repeat however many times, then XOR the generated numbers together, and use the result as a pad?

    source

    • pageflight@lemmy.world ⁨6⁩ ⁨hours⁩ ago

      Steganography may be interesting in that vein. Hiding data within larger images / sound files etc.

      source
    • ricecake@sh.itjust.works ⁨6⁩ ⁨hours⁩ ago

      That’s no longer a one time pad. That’s closer to a homebrew stream cipher with the weakness of having a key that you just hope no one notices.

      source