GlobalSign Access Control Authentication utilizes digital certificates for two-factor authentication, combining a certificate as something you have and a password as something you know. It enables organizations to control access to networks, applications, and resources, supporting role-based access and device-specific authentication. The solution integrates with various systems such as Windows logon, cloud services, and VPNs, while also providing features like encryption, identity validation, and centralized certificate management to enhance security and ensure regulatory compliance.