Kryptek is a term arising from the union of two words: Kryptos and Technology.

"Kryptos" is a Greek word meaning "hidden" or "secret" and "technology" comes from the Greek "techne" which means "art", "craft" or "skill". So its creators intended

Kryptek to mean:

"The art of being hidden"
Hidden or protected from the various elements of Mother Nature.

"Arts and secret skills"
Superior capabilities in the field shared by elite fighters.