Which of the following statements is true? a. Symmetric encryption is faster than asymmetric encryption and can be used to provide nonrepudiation of contracts. b. Symmetric encryption is faster than...

a. Symmetric encryption is faster than asymmetric encryption and can be used to provide nonrepudiation of contracts.

b. Symmetric encryption is faster than asymmetric encryption but cannot be used to provide nonrepudiation of contracts.

c. Asymmetric encryption is faster than symmetric encryption and can be used to provide nonrepudiation of contracts.

d. Asymmetric encryption is faster than symmetric encryption but cannot be used to provide nonrepudiation of contracts.