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barry barry
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9 years ago
Encryption has a remarkably long and varied history. The invention of writing was apparently soon followed by a desire to conceal messages. One of the earliest methods, attributed to an ancient Roman emperor, was the simple substitution of numbers for letters, for example A = 1, B = 2, etc. This is an example of
A) a hashing algorithm.
B) symmetric key encryption.
C) asymmetric key encryption.
D) a public key.
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newstartnewstart
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