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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Computers are smarter than humans.
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Computers are faster than humans.
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The Vigenere was originally designed by a computer.
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They are not; humans are better at breaking encryptions than computers.
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Detailed explanation-1: -This method is much more secure than the autokey method, but that does not mean it is not vulnerable. The cipher is more secure with longer keywords.
Detailed explanation-2: -The Vigenère cipher is a polyalphabetic cipher from the 16th century which uses several Caesar ciphers to encrypt the same message that renders more complexity to the whole encryption scheme/process, thereby making the cipher hard to crack.
Detailed explanation-3: -The Caesar cipher is easily cracked because there are only 25 possible keys. You can quickly reveal the message by trying each one in turn. In fact, you don’t need to attempt to decrypt the whole message because it should be obvious from the first word or two whether you have the correct shift.
Detailed explanation-4: -Depending on where it falls in the message, each character of plaintext could be any one of several ciphertexts. For example, in the example above, e becomes E, M, or I, and the two Es in the ciphertext come from an e or an r. The Vigenère cipher is significantly harder to break than a Caesar cipher.