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UGC NET June-2019 CS Paper-2
August 22, 2024
UGC NET June-2019 CS Paper-2
August 22, 2024

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Question 4

Suppose that two parties A and B wish to setup a common secret key (D-H key) between themselves using the Diffie-Hellman key exchange technique. They agree on 7 as the modulus and 3 as the primitive root. Party A chooses 2 and party B chooses 5 as their respective secrets. Their D-H key is

A
3
B
4
C
5
D
6
Question 4 Explanation: 
For Diffe-Hellaman the secret key is (pab)modn,
where p is the primitive root and n is the modulus and ‘a’ and ‘b’ are the secret values selected by parity A & B.
So answer is,
32×5 mod 7 = 310 mod 7 = 4
Correct Answer: B
Question 4 Explanation: 
For Diffe-Hellaman the secret key is (pab)modn,
where p is the primitive root and n is the modulus and ‘a’ and ‘b’ are the secret values selected by parity A & B.
So answer is,
32×5 mod 7 = 310 mod 7 = 4
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