1
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
The total number of keys required for a set of n individuals to be able to communicate with each other using secret key and public key crypto-systems, respectively are:
A
n(n - 1) and 2n
B
2n and $${{N(N - 1)} \over 2}$$
C
$${{N(N - 1)} \over 2}$$ and 2n
D
$${{N(N - 1)} \over 2}$$ and n
2
GATE CSE 2005
MCQ (Single Correct Answer)
+2
-0.6
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
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