Meets the security requirements of PSD PP v4.0. The ATEN PSD PP v4.0 Secure KVM Switch CS1148DP4 has been specifically designed to meet the stringent security requirements of defense and intelligence agencies. The ATEN PSD PP v4.0 Secure KVM Switch CS1148DP4 complies with the PSD PP v4.0 standard (Protection Profile for Peripheral Sharing Device, Version 4.0) certified by the National Information Assurance Partnership. The ATEN PSD PP v4.0 Secure KVM Switch CS1148DP4 provides isolation between computer sources and peripherals while allowing the simultaneous use of a keyboard, mouse, monitor, and speaker set from connected computers of varying classification levels. Compliance with PSD PP v4.0 ensures that the sharing of peripherals offers the highest level of security for user data when switching the focus of the port. Key protective features include isolation and unidirectional data flow.