A system and method for facilitating authentication or identification services including an authentication server configured to provide an authentication certificate to a user of a first client device for authentication or identification of a user of a second client device. The first and second client devices are configured to communicate with each other and the authentication server. Each of the first and second client devices includes a user control program configured to communicate data to and from the authentication server. A media gateway is coupled to the authentication server to enable communication of media data from the first and second client devices to the authentication server. The user control program of the first client device is configured to receive a certificate corresponding to the user of the second client device and the authentication certificate from the authentication server. The user control program of the first client device is configured to authenticate the user of the second client device by comparing the certificate corresponding to the second client device and the authentication certificate.