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    • 2. 发明授权
    • Apparatus and method for controlling secure communications between peripheral components on computer buses connected by a bridge circuit
    • 用于控制由桥接电路连接的计算机总线上的外围组件之间的安全通信的装置和方法
    • US06473825B1
    • 2002-10-29
    • US09481331
    • 2000-01-12
    • James F. WorleyMichael J. BlasdelRobert R. HaleCarolyn A. Lynch
    • James F. WorleyMichael J. BlasdelRobert R. HaleCarolyn A. Lynch
    • G06F1338
    • G06F21/85G06F13/4031
    • An apparatus for and a method of controlling secure communication between peripheral components in a communication system. The security level of each peripheral component address in the communication system is fixed. When a message is communicated, a bus access arbiter (122) detects the address of the originating peripheral component, and an address detector (110, 114) detects the address of the destination peripheral component. An address comparison circuit (116) determines whether the address of the destination peripheral component is an address to which the originating peripheral component is permitted to communicate. The address comparison circuit (116) is responsive to the address of the destination peripheral component being an address to which the originating peripheral component is permitted to communicate by permitting communication of messages from the originating peripheral component. The address comparison circuit (116) is further responsive to the address of the destination peripheral component not being an address to the which the originating peripheral component is permitted to communicate by generating an error signal, preventing communication of further messages from the originating peripheral component.
    • 一种用于控制通信系统中的外围组件之间的安全通信的装置和方法。 通信系统中每个外设组件地址的安全级别是固定的。 当通信消息时,总线访问仲裁器(122)检测始发外围组件的地址,并且地址检测器(110,114)检测目标外设组件的地址。 地址比较电路(116)确定目的地外围组件的地址是否是始发外围组件被允许通信的地址。 地址比较电路(116)通过允许来自始发外围组件的消息的通信来响应目的地外围组件的地址,该地址是始发外设组件允许通信的地址。 地址比较电路(116)进一步响应目的地外围组件的地址,而不是通过产生错误信号来允许始发外设组件进行通信的地址,从而防止来自始发外设组件的其他消息的通信。