Safeware: system safety and computers
Safeware: system safety and computers
Handbook of software reliability engineering
Handbook of software reliability engineering
An analyst's view of IS security
Information systems security
Software safety and reliability: techniques, approaches, and standards of key industrial sectors
Software safety and reliability: techniques, approaches, and standards of key industrial sectors
A Qualitative Approach to Information Availability
Proceedings of the IFIP TC11 Fifteenth Annual Working Conference on Information Security for Global Information Infrastructures
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Constant changes in the structure of the organization and the working processes have forced security staff to reclassify and re-evaluate information and information systems too often. In this paper we present one solution to make if possible to use the previous data as much as possible and recalculate the evaluation results automatically. The solution is based on piercing the processes into parts of the block diagram and then analyzing the classification of each block. This procedure is continued from top to down until there is no remarkable processes left. After the top-down phase has been reached its end a second phase is started from bottom to top. In this phase the reliability of each block is analyzed and the results of one level is combined. This result is then passed to the upper level and this procedure may continue until the top is reached. In every level it is possible to have iterative loops if the requirements are not met. It is usually easier to add parallel processes for assurance than improve the reliability of the single component.