The result of encryption performed on plaintext using an algorithm, making it unreadable to anyone except those possessing special knowledge, usually referred to as a key.

The security system converts sensitive information into ciphertext to protect it from unauthorized access.

ciphertextadjective

Relating to or consisting of ciphertext; used before another noun to denote that the following noun is in encrypted form.

The analyst examined a ciphertext message to test the new decryption algorithm.