Abstract
At the time when IEC 61508 was being created, analogous work was also being done to harmonise security evaluation criteria. Although there was no cross-fertilisation between these two activities, the MISRA project did use the ITSEC evaluation criteria as the basis for its recommendations on the requirements for software at varying levels of integrity. This paper points out the advantages of this approach for safety engineers, and explains how it overcomes some of the difficulties that people now have in applying IEC 61508. It also shows how the approach can be used for other attributes such as electromagnetic compatibility.
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