Like, say, you are a revolutionary who’s imprisoned, but you are allowed to write letters to your family. How would you covertly send a message to your fellow revolutionaries that only they can decode? (Your family are on your side will pass the letter along)

Obviously, it cannot appear to contain any obvious ciphertext, since the prison guards would just rip up your letter and not send it.

  • dbx12
    3·
    1 day ago

    You usually get the book corresponding to your faith, so that would be an option. Given that the Bible (can’t speak mich about it but way less about the others) has chapters and verses and what not, addressing single words is simple.

    For the “name of relative is the code”, yeah that needs a good memory.