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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Cipher
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Key
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Policies
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Strong Passwords
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Detailed explanation-1: -The Caesar cipher is a classic example of ancient cryptography and is said to have been used by Julius Caesar. The Caesar cipher is based on transposition and involves shifting each letter of the plaintext message by a certain number of letters, historically three, as shown in Figure 5.1.
Detailed explanation-2: -The action of a Caesar cipher is to replace each plaintext letter with a different one a fixed number of places down the alphabet.
Detailed explanation-3: -Shift ciphers (also known as Caesar shift ciphers) work by swapping a letter for another one by moving along the alphabet by a fixed number of places. For example, if you shift by 1, then A would become B, B would become C, C would become D, etc. If you shift by 2, then A would become C, B would become D, etc.
Detailed explanation-4: -Caesar Cipher-a technique for encryption that shifts the alphabet by some number of characters. Cipher-the generic term for a technique (or algorithm) that performs encryption. More items