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In Cyber Physical Systems (CPSs), traditional security mechanisms such as cryptography and access control are not enough to ensure the security of the system. In a CPS, security is violated through complex interactions between the cyber and physical worlds, and, most insidiously, unintended information leakage through observable physical actions. Information flow analysis, which aims at controlling...
The key to computer security is the notion of information flow. Information flow occurs either explicitly or implicitly in a system. In cyber-physical systems (CPSs), complicated interactions occur frequently between computational components and physical components. Thus, detecting and quantifying information flow in these systems is more difficult than it is in purely cyber systems. In CPSs, failures...
The uncertainty of the border leads to the dynamics of granularity pair. In order to characterize the dynamic trend that the difference degree is close to the identity degree, the confidence threshold is introduced. Based on the positive correlation between the confidence threshold and the border of granularity pair, this paper proposes a new algorithm for dynamic hierarchy. The example shows that...
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