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An efficient use of public key infrastructure (PKI) sho…

An efficient use of public key infrastructure (PKI) should encrypt the:

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A.
entire message.

B.
private key.

C.
public key.

D.
symmetric session key.

Explanation:
Public key (asymmetric) cryptographic systems require larger keys (1,024 bits) and involve intensive and timeconsuming computations. In comparison, symmetric encryption is considerably faster, yet relies on the security
of the process for exchanging the secret key. To enjoy the benefits of both systems, a symmetric session key is
exchanged using public key methods, after which it serves as the secret key for encrypting/decrypting
messages sent between two parties.


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