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Error secure/propagating concept and its application to the design of strongly fault-secure processors

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2 Author(s)
Nanya, T. ; Dept. of Comput. Sci., Tokyo Inst. of Technol., Japan ; Kawamura, Toshiaki

A concept of the error-secure and the error-propagating interfaces of the subsystems in a digital system is introduced, and shown to be useful for practical design and verification for a strongly fault-secure system which is known to achieve the totally self-checking (TSC) goal. A sufficient condition is shown for subsystem interfaces to meet for it to be possible to construct a strongly fault-secure system with no checkers used to monitor the embedded interfaces. On the basis of the error-secure/propagating concept, a design is presented for a strongly fault-secure microprocessor which implements the instruction set of Intel's i8080 8-b microprocessor. In the design, a complete set of building blocks is defined and all the partial interfaces are verified for the error secure/propagating property. Only four checkers are used at the embedded interfaces in the resulting strongly fault-secure processor

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Computers, IEEE Transactions on  (Volume:37 ,  Issue: 1 )