Secure keyboard, video, mouse switch, KVM-switch

摘要

A secure switch assembly for controlling first and second computers using a common keyboard and a common mouse is provided. The switch assembly comprises a secure controller together with first and second switching elements. The secure controller comprises receiving means, configured to receive a selection signal from a user, determining means configured to determine whether the selection signal represents a single, coherent selection and transmitting means configured to emit first and second enabling signals. The first switching element is associated with a first computer and is configured to receive a signal indicative of a mouse instruction from a mouse, a signal indicative of a keyboard instruction from a keyboard and a first enabling signal from the secure controller. The second switching element is also associated with the first computer and is configured to receive a signal indicative of a mouse instruction from the first switching element, a signal indicative of a keyboard instruction from the first switching element and a second enabling signal from the secure controller. The first and second switching elements are configured to enable transmission of the mouse and keyboard instructions therethrough if both the first and second enabling signals are respectively received. The first and second computers are effectively isolated by the first and second switching elements and thereby effect assurance to a high grade.