Chapter 1 What exactly is a public key infrastructure? The original concept
People have been sending encrypted messages since as far back as Roman times, if not before. Indeed, it is likely that ancient civilisations, such as the Bronze Age Harappan culture in the Indus Valley and the Neolithic ancient Egyptians in the Nile valley, would have had various ways of encrypting communications. Indeed, recent discoveries have unveiled deliberately obscured or ‘encrypted’ hieroglyphic writing from ancient Egypt. Their methods must have been particularly interesting. Even before the advent of writing, it is likely that people would use particular spoken phrases in order to indicate particular situations. Children often ...
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