8-Port USB DVI Secure KVM Switch (PSD PP v4.0 Compliant) The ATEN PSD PP v4.0 Secure KVM Switch CS1188D4 has been specifically designed to meet the stringent security requirements of defense and intelligence agencies. The ATEN PSD PP v4.0 Secure KVM Switch CS1188D4 complies with the PSD PP v4.0 standard (Protection Profile for Peripheral Sharing Device, Version 4.0) certified by the National Information Assurance Partnership (NIAP). The ATEN PSD PP v4.0 Secure KVM Switch CS1188D4 provides isolation between computer sources and peripherals while allowing shared use of a keyboard, mouse, monitor, and speaker set from connected computers of varying security classifications. Compliance with PSD PP v4.0 ensures that peripheral sharing offers the highest level of security for user data when switching the focus of the ports. Key protective features include isolation and unidirectional data flow, restricted peripheral connection and filtering, user data protection, configurable device filtering and management, stringent audio filtering, and a tamper-proof design that is always ready for use.