Meets the security requirements of PSD PP v4.0. The ATEN PSD PP v4.0 Secure KVM Switch CS1144D4 has been specifically designed for the stringent security requirements of defense and intelligence facilities. The ATEN PSD PP v4.0 Secure KVM Switch CS1144D4 complies with the PSD PP v4.0 standard (Protection Profile for Peripheral Sharing Device, Version 4.0), which has been certified by the National Information Assurance Partnership (NIAP). The ATEN PSD PP v4.0 Secure KVM Switch CS1144D4 provides isolation between computer sources and peripheral devices while allowing the simultaneous sharing of a single keyboard, mouse, monitor, and speaker set among connected computers of different security classifications. Compliance with PSD PP v4.0 ensures that the sharing of peripheral devices offers the highest level of security for user data when the port focus is switched, thereby preventing unauthorized data flows or leaks between connected sources.