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UGC-NET | UGC NET CS 2018 July – II | Question 48

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  • Last Updated : 14 Sep, 2018

Decrypt the message “WTAAD” using the Caesar Cipher with key=15.

Answer: (B)

Explanation: In Ceaser cipher algorithm encryption and decryption takes place.
During encryption right shift takes place depending upon the key and in decryption left shift takes place depending on key.
In the given question key value is 15 and decryption is asked:
Given message is WTAAD
Left shift 15 on W is H
Left shift 15 on T is E
Left shift 15 on A is L
Left shift 15 on A is L
Left shift 15 on D is O
The decrypted message will HELLO.
So, option (B) is correct.

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