₿itCat on Nostr: In simple terms, the ciphertext and substitution table are publicly displayed, and ...

In simple terms, the ciphertext and substitution table are publicly displayed, and without knowing the rules, it is impossible to reverse deduce the plaintext. Even if the plaintext, ciphertext, and substitution table are publicly displayed, it is impossible to reverse deduce the rules. I will give an example to illustrate this later.