cryptology

noun

1. (uncountable, usually)The science or study of mathematical, linguistic, and other coding patterns and histories.

   “Meronyms: cryptography, cryptanalysis; encoding, decoding; encrypting, decrypting, decyphering”

2. (uncountable, usually)The practice of analysing encoded messages, in order to decode them.

   “Near-synonyms: cryptanalysis, decoding, decrypting, decyphering”

3. (uncountable, usually)Secret or enigmatical language.

   “But the question of speech-play causes confusion to the slang researcher because this subject borders on family slang, private lingo, secret language, cryptologies, disguised language of children and grown-ups”