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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Each letter is replaced with a particular symbol
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Each letter is replaced with a letter a certain number of steps down the alphabet
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Each letter is replaced with a particular number from 0 to 26, and numbers are replaced with letters.
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Each letter is replaced with a completely random number
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Detailed explanation-1: -Caesar cipher algorithm is an algorithm by replacing the initial letter position with alphabet or called ROT3 algorithm. Transposition algorithm that is by changing the location of text message to be encoded by using certain form[10].
Detailed explanation-2: -The Caesar Cipher is a monoalphabetic rotation cipher used by Gaius Julius Caesar. Caesar rotated each letter of the plaintext forward three times to encrypt, so that A became D, B became E, etc., as shown in Table 4.6.
Detailed explanation-3: -Substitution Ciphers. Substitution ciphers encrypt the plaintext by swapping each letter or symbol in the plaintext by a different symbol as directed by the key. Perhaps the simplest substitution cipher is the Caesar cipher, named after the man who used it.
Detailed explanation-4: -The action of a Caesar cipher is to replace each plaintext letter with a different one a fixed number of places down the alphabet. The cipher illustrated here uses a left shift of three, so that (for example) each occurrence of E in the plaintext becomes B in the ciphertext.