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Information security in Process-aware Information System (PAIS) relies onmany factors, including security of business process and the underlying systemand technologies. Moreover, humans can be the weakest link that creates pathwayto vulnerabilities, or the worst enemy that compromises a well-defended system.Since a system is as secure as its weakest link, information security can onlybe achieved in PAIS if all factors are secure. In this paper, we address tworesearch questions: how to conduct a cross-layer security analysis that couplesecurity concerns at business process layer as well as at the technical layer;and how to include human factor into the security analysis for theidentification of human-oriented vulnerabilities and threats. We propose amethodology that supports the tracking of security interdependencies betweenfunctional, technical, and human aspects which contribute to establish aholistic approach to information security in PAIS. We demonstrate theapplicability with a scenario from the payment card industry.

A Cross-Layer Security Analysis for Process-Aware Information Systems