Cryptology
Defense
The science that deals with hidden, disguised, or encrypted communications. It includes communications security and communications intelligence.
Security
The science that deals with hidden, disguised, or encrypted communications. It includes communications security and communications intelligence.
Telecommunications
The science that deals with hidden, disguised, or encrypted communications. It includes communications security and communications intelligence. [JP1-02] 2. [The] field encompassing both cryptography and cryptanalysis. [INFOSEC-99]