- cryptanalysis, cryptanalytics, cryptography, cryptology - the science of analyzing and deciphering codes and ciphers and cryptograms
--1 is a kind of science, scientific discipline
- cryptography, coding, secret writing - act of writing in code or cipher
--2 is a kind of writing, committal to writing
--2 has particulars:encoding, encryption; recoding; decoding, decryption, decipherment