Definition: Cipher is an algorithm which is applied to plain text to get ciphertext. It is the unreadable output of an encryption algorithm. The term "cipher" is sometimes used as an alternative term for ciphertext. Ciphertext is not understandable until it has been converted into plain text using a key.

How do you spell ciphertext?

the encoded version of a message or other text; cryptogram.

What does ciphertext mean?

Ciphertext is what encryption algorithms, or ciphers, transform an original message into. Data is said to be encrypted when a person or device lacking the cipher is unable to read it.