COMPUTER ETHICS AND SECURITY
CRYPTOGRAPHY AND ENCRYPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They weren’t encrypted before computers
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So in war Commanders/leaders could communicate safely with their troops
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To share messages with people who were clever enough to solve them
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All of these reason
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Detailed explanation-1: -Up to the Second World War, most of the work on cryptography was for military purposes, usually used to hide secret military information. However, cryptography attracted commercial attention post-war, with businesses trying to secure their data from competitors.
Detailed explanation-2: -The original message is called the plaintext message. The encrypted message is called the ciphertext message.
Detailed explanation-3: -One of the earliest encryption techniques is the Caesar Cipher, invented by Julius Caesar more than two thousand years ago to communicate messages to his allies.
Detailed explanation-4: -The first recorded use of cryptography for correspondence was by the Spartans, who as early as 400 bc employed a cipher device called the scytale for secret communication between military commanders.