In the US, insults are not something for which you can be prosecuted. Calling someone a son of a bitch is not defamatory. No one believes you are really the child of a dog. So that is an opinion. Defamation requires a false factual statement. Truth is a complete defense.
What is Public Key Infrastructure (PKI)? Public Key Infrastructure (PKI) is a set of hardware, software, people, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates. In cryptography, a PKI is an arrangement that binds public keys with respective user identities by means of a certificate authority (CA). Wikipedia.org
To use certificates in Windows Server 2003, you need to set up a public key infrastructure (PKI), which consists of one or more CAs that are linked in a hierarchy. These CAs and the PKI are required to manage certificate issuance, validation, renewal, and revocation in one or more organizations. You can use a third-party PKI with Windows Server 2003, or you can establish your own PKI based on Windows Server 2003 Certificate Services.