Public Key Infrastructure (PKI) is a first attempt to provide all the aspects of security to messages and transactions that have been previously discussed. It contains four components including:
a. Certificate Authority (CA), Registration Authority (RA), RSA, and digital certificates
b. Certificate Authority (CA), RSA, Document Authority (DA), and digital certificates
c. Document Authority (DA), Certificate Authority (CA), and RSA
d. Registration Authority (RA), RSA, and digital certificates
Answer: A
Public Key Infrastructure (PKI) contains four components: certificate authority (CA), registration authority (RA), RSA, and digital certificates.