TheCodeBreakers
An
exhaustive investigation of the concept of secrecy would require, as
Maurits de Vries has pointed out, "a complete examination of the
relations between individuals and be-tweea groups in our society,"
because secrecy is the antithesis of communication, and
communication—as that which makes man a social being—encompasses
all aspects of cultural behavior. Cryptography combines these antitheses
into a single operation; a wag might define it as "noncommunicating
communication."
The relation between cryptography and cryptanalysis is not logically
necessary; it is contingent. One can envision men communicating by
secret means with others not even thinking of prying. But in the real
world, the cryptanalyst —or more accurately the potential cryptanalyst—
comes first. What need for cryptography if no one would eavesdrop? Why
build forts if no one would attack? Thus the assumption that someone
annaabi.ee 
