期刊名称：Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications
印刷版ISSN：2093-5374
电子版ISSN：2093-5382
出版年度：2014
卷号：5
期号：2
页码：59-79
出版社：Innovative Information Science & Technology Research Group
摘要：Insider threats are a major threat to many organisations. Even worse, insider attacks are usually hard to detect, especially if an attack is based on actions that the attacker has the right to perform. In this paper we present a step towards detecting the risk for this kind of attacks by invalidating policies using structural information of the organisational model. Based on this structural information and a description of the organisation's policies, our approach invalidates the policies and identifies exem- plary sequences of actions that lead to a violation of the policy in question. Based on these examples, the organisation can identify real attack vectors that might result in an insider attack. This informa- tion can be used to refine access control systems or policies. We provide case studies showing how mechanical verification tools, i.e. modelchecking with MCMAS and interactive theorem proving in Isabelle/HOL, can be applied to support the invalidation and thereby the identification of the attack vectors.
