Keeping Data Secret
The concept of keeping data secret isn’t new. In fact, it’s one of the oldest reasons
to use an algorithm of some sort. The word cryptography actually comes from two
Greek words: kryptós (hidden or secret) and graphein (writing). In fact, the Greeks
were probably the first users of cryptography, and ancient texts report that Julius
Caesar used encrypted missives to communicate with his generals. The point is,
keeping data secret is one of the longest running battles in history. The moment
one party finds a way to keep a secret, someone else finds a way to make the secret
public by breaking the cryptography. General uses for computer-driven cryptog-
raphy today include:
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