Crypto

Crypto is an English prefix that means "hidden" or "secret".

The term crypto is also employed as shorthand for the following:

Cryptography, the practice of the use of encryption.
Cryptology, the study of cryptography and cryptanalysis
CRYPTO, an annual cryptography conference.
Crypto is a book by Steven Levy about the evolution of cryptography since the turn of the century.
Crypto AG, a Swiss information security company.
Cryptosporidiosis, a disease affecting the intestines of mammals that is caused by Cryptosporidium, a protozoan parasite.
the codeword CRYPTO is also used to designate cryptographic key material for securing US-government communications involving classified or sensitive information.
The prefix crypto- is used to refer to many groups which secretly adhere to a doctrine (often religious or political) while attempting to disguise it. For example: