Patent ID: 6327688
Filing Date: 2001-12-04
Classification: G06F,H04L

Abstract:
A data bus system arranged to convey messages between devices connected to a data bus and to verify the integrity of the messages conveyed at the datalink layer of said bus, comprising:a data bus for conveying messages between devices connected to said bus,a message originating device connected to said bus and arranged to initiate bus transactions with other devices connected to said bus, andat least one receiving device connected to said data bus and arranged to automatically send at least one multiple-bit check sequence to said originating device for each bus transaction conducted between said receiving device and said originating device, the bits of said at least one check sequence having a value which is dependent on the data conveyed during its associated bus transaction,said originating device further arranged to receive said at least one check sequence and use it to verify the integrity of the messages conveyed in said bus transaction such that the integrity of messages conveyed on said data bus are verified at the datalink layer of said bus.