Sec. 24. "Public key infrastructure" means a method of enabling a user of an unsecured public computer network, including the Internet, to securely and privately exchange data and money through a public and private cryptographic key pair that is obtained and shared through a trusted certificate authority, providing for a:
(1) digital certificate that is able to identify an individual or organization; and
(2) directory service that is able to store and, if necessary, revoke the digital certificate.