Using Certification Trails to Achieve Software Fault Tolerance

This novel invention comprises a method and apparatus to achieve fault tolerance in hardware and software systems. The method involves the steps of executing a first algorithm and a second algorithm on input which produces a first output and certification trail, and second output respectively. Comparing the first andsecond outputs, the system produces an error result if the first and second outputs are not the same. The apparatus involves an improved central processing unit having the first and second algorithm which produces the first and second output respectively based on the input and at least a portion of the certification trail.


5,243,607

Patents:
US 5,243,607

Type of Offer: Licensing



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