How many Key are used for asymmetric-key cipher?

A. 1 Key

B. 2 Key

C. 3 Key

D. 4 Key

Correct Answer is :

B. 2 Key

Explanation

In asymmetric (public key) cryptography, both communicating parties (i.e. both Alice and Bob) have two keys of their own — just to be clear, that's four keys total.