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The database-driven CRN has emerged as a promising solution for the spectrum scarcity issue. However, it also raises severe privacy concerns. Although there are some existing works on this topic, they are far from practical due to their restrict on particular database structures or extremely heavy computation and communication overhead. To address these issues, in this paper we develop two practical...
The database-driven cognitive radio network (CRN) is regarded as a promising way for a better utilization of spectrum resources without introducing the interference to primary users (PUs). However, there are some critical security and privacy issues in database-driven CRNs, which have been rarely discussed before. First of all, in order to retrieve the spectrum available information (SAI) of one's...
Access control mechanisms can't efficiently restrict hidden information flow, and confidential information can stealthily leak out with hidden information flow. We outline a state-based approach to analyzing hidden information flow. The main idea of the approach is to model secure systems as finite automata, and analyze the properties of information flow by studying the characteristic of the finite...
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