The Effect of trust assumptions on the elaboration of security requirements

Haley, Charles B.; Laney, Robin C.; Moffett, Jonathan D. and Nuseibeh, Bashar (2004). The Effect of trust assumptions on the elaboration of security requirements. In: 12th IEEE International Requirements Engineering Conference (RE'04), 6-10 Sep 2004, Kyoto, Japan.



Assumptions are frequently made during requirements analysis of a system-to-be about the trustworthiness of its various components (including human components). These trust assumptions can affect the scope of the analysis, derivation of security requirements, and in some cases how functionality is realized. This paper presents trust assumptions in the context of analysis of security requirements. A running example shows how trust assumptions can be used by a requirements engineer to help define and limit the scope of analysis and to document the decisions made during the process. The paper concludes with a case study examining the impact of trust assumptions on software that uses the Secure Electronic Transaction (SET) specification.

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