n. [ Gr. krypto`s hidden + -graph: cf. F. cryptographe. ] Cipher; something written in cipher. “Decipherers of cryptograph.” J. Earle. [ 1913 Webster ]

a. Pertaining to cryptography; cryptographical. Boyle. [ 1913 Webster ]

n. 1. One who writes in cipher, or secret characters. [ 1913 Webster ]

2. one who studies methods for encoding and decoding messages; one who studies cryptography. [ PJC ]

{ } a. Relating to cryptography; written in secret characters or in cipher, or with sympathetic ink. [ 1913 Webster ]

n. Same as Cryptographer. [ 1913 Webster ]

n. [ Cf. F. cryptographie. ] 1. The act or art of writing in code or secret characters; also, secret characters, codes or ciphers, or messages written in a secret code. [ 1913 Webster +PJC ]

2. The science which studies methods for encoding messages so that they can be read only by a person who knows the secret information required for decoding, called the key; it includes cryptanalysis, the science of decoding encrypted messages without possessing the proper key, and has several other branches; see for example steganography. [ PJC ]