UGC-NET | UGC NET CS 2016 July – II | Question 29
If there are N people in the world and are using secret key encryption/decryption for privacy purpose, then number of secret keys required will be:
(A) N
(B) (N – 1)
(C) N (N – 1) / 2
(D) N (N + 1) / 2
Answer: (C)
Explanation:
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Last Updated :
18 Apr, 2018
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