plural of Caesar cipher

plural of Playfair cipher

plural of stream cipher

plural of Vigenère cipher

Encoded text, text that is unreadable.

plural of ciphertext

Resembling or characteristic of a cipher.

nothingness

The condition of being a cipher / nonentity

(cryptography) An attack on a cryptosystem that relies only on the attacker's knowledge of some ciphertexts encrypted with that system and key. Less powerful than a known-plaintext attack.