Verifying physical universal serial bus keystrokes

摘要

A method and system for securing access to a keyboard driver in a host computer. The host computer includes a host processor that manages communication between a keyboard driver and a keyboard attached to the host computer. In accordance with a method of the present invention, a packet is received on a bus that connects the keyboard to the host processor. A determining is made of whether or not the packet originated from the keyboard. In response to determining that the packet originated from the keyboard, a independent bus traffic monitor processor sets an input secure bit which is then read by the host processor to selectively provide access to the keyboard driver in accordance with verification that the keyboard originated the packet.