cryptograph

From crypto- +‎ -graph.

cryptograph (plural cryptographs)

1. A cipher or cryptogram.
   • 1873, John Earle, The Philology of the English Tongue:

     decipherers of cryptograph

2. A device used for encrypting or decrypting text.

cryptograph (third-person singular simple present cryptographs, present participle cryptographing, simple past and past participle cryptographed)

1. (rare) To write text using a code or cipher.