The use of encryption and authentication can improve network and host security. But there are many steps that must be taken, and done correctly, before cryptography becomes part of a secure solution.. . .
The use of encryption and authentication can improve network and host security. But there are many steps that must be taken, and done correctly, before cryptography becomes part of a secure solution.

The history of cryptography goes back almost as far as the beginning of written history itself. Substitution cyphers, where one letter or token gets substituted by another, were used by the ancient Greeks. Cryptography and the breaking of codes were critical factors in the naval, air and sea battles of World War II.

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