Source : Webster's Revised Unabridged Dictionary (1913)

Cryptographer \Cryp*tog"ra*pher\ (kr?p-t?g"r?-f?r), n.
   One who writes in cipher, or secret characters.

Source : WordNet®

cryptographer
     n : decoder skilled in the analysis of codes and cryptograms
         [syn: {cryptanalyst}, {cryptologist}]