COMPUTER THREATS SECURITY
TYPES OF COMPUTER SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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abc
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3
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2
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alphabet mapping table
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Detailed explanation-1: -The Caesar cipher is named after Julius Caesar, who, according to Suetonius, used it with a shift of three (A becoming D when encrypting, and D becoming A when decrypting) to protect messages of military significance.
Detailed explanation-2: -The Caesar cipher shifts all the letters in a piece of text by a certain number of places. The key for this cipher is a letter which represents the number of place for the shift. So, for example, a key D means “shift 3 places” and a key M means “shift 12 places”.
Detailed explanation-3: -For example, if the key is 3, the letter A, which is the first letter in the alphabet, is substituted by the letter D, which is the fourth letter in the alphabet. B (the second letter) is replaced by E (the fifth letter), and so on.
Detailed explanation-4: -The Trifid Cipher was created in 1902 by Félix Delastelle. It is simple and complex with how it encodes and decodes a message. The letters of the alphabet are placed in a 3x3x3 randomly along with a “.” for the final spot.