COMPUTER FUNDAMENTALS

COMPUTER ETHICS AND SECURITY

CRYPTOGRAPHY AND ENCRYPTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
“CAESAR CIPHER” has been encrypted with Caesar cipher to “SQUIQH SYFXUH". The key used was:
A
16
B
14
C
13
D
12
Explanation: 

Detailed explanation-1: -Caesar Box. The “Caesar Box, ‘’ or “Caesar Cipher, ‘’ is one of the earliest known ciphers. Developed around 100 BC, it was used by Julius Caesar to send secret messages to his generals in the field. In the event that one of his messages got intercepted, his opponent could not read them.

Detailed explanation-2: -ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the latin alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient Rome.

Detailed explanation-3: -One of the earliest and best-known encryption schemes is the Caesar Cipher. The Caesar Cipher is a shift cipher and encrypts the data by replacing the original letters with “x” number of characters ahead in the alphabet.

Detailed explanation-4: -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”.

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