1. 
[syn: cryptanalysis, cryptanalytics, cryptography, cryptology]
The Collaborative International Dictionary of English v.0.48:
Cryptology \Cryp*tol"o*gy\ (kr?p-t?l"?-j?), n. [Gr. krypto`s
   hidden + -logy.]
   Secret or enigmatical language. --Johnson.
   [1913 Webster]
WordNet (r) 3.0 (2006):
cryptology
    n 1: the science of analyzing and deciphering codes and ciphers
         and cryptograms [syn: cryptanalysis, cryptanalytics,
         cryptography, cryptology]
The Free On-line Dictionary of Computing (30 December 2018):
cryptology
    The study of cryptography and cryptanalysis.
   (1994-12-06)