• (a.) Pertaining to cryptography; cryptographical.
Cryp·tog'ra·phal adjective Pertaining to cryptography; cryptographical. Boyle. 
cryptography, cryptographic, cryptographical, cryptographal 1. The science or study of secret writing, especially code and cipher systems. 2. The procedures and methods of making and using secret languages; such as, codes or ciphers. A spy is deciphering a coded message. —Word Info image © ALL rights reserved.