A client includes a security agent configured to create a client certificate that corresponds to one or more client identifiers. A server includes a server certificate and is in communication with the security agent. The server is configured to facilitate establishing an initial mutually authenticated transport layer security (TLS) session with the client based on the client certificate and the server certificate. The server is also configured to extract the client certificate from the security agent once the TLS session is established. The server is configured to store the certificate as being associated with only the corresponding client identifier(s) and to categorize the association between the client certificate and the corresponding client identifier(s) as being secure but not trusted for the client until the identity of the client has been verified. Moreover, the server is configured to receive an indication that the identity of the client has been verified.