crypto |ˈkriptō|
noun
1 short for cryptography .
2 ( pl. –tos) informal a person having a secret allegiance to a political creed, esp. communism.
crypto-
combining form
concealed; secret : cryptogram.
ORIGIN from Greek kruptos ‘hidden.’

cryptography |kripˈtägrəfē|
noun
the art of writing or solving codes.
DERIVATIVES
cryptographer |-fər| noun
cryptographic |ˌkriptəˈgrafik| adjective
cryptographically |ˌkriptəˈgrafik(ə)lē| adverb