Improving wireless security through network diversity

Tao Ye, Darryl Veitch, Jean Bolot
2008 Computer communication review  
Data confidentiality has been an ongoing challenge in wireless networks. Wireless channels are prone to passive sniffing attacks and mobile devices can be difficult to secure due to a lack of computing power and weak supporting encryption components. However, modern mobile devices often have multiple wireless interfaces with diverse channel capacity and security capabilities, which means that mobile transactions (involving at least one mobile device) can be carried out using several links. In
more » ... several links. In this paper, we show that the availability of diverse, heterogenous links (physical or logical) between nodes in a network can be used to increase the confidentiality of the information transmitted between them, on top of the availability or strength of underlying encryption techniques. Specifically, we make two contributions. First, we introduce a new security model using multiple channels to transmit data securely, based on the idea of deliberate corruption and information reduction. Second, in an effort towards provable security, we analyze the security of our model in the wiretap channel framework of information theory and characterize the secrecy capacity of our system. We show that in an adverse environment, simply splitting traffic to a more secure channel can indeed achieve perfect secrecy.
doi:10.1145/1496091.1496096 fatcat:jlm3vjatbvdd7frxhiu73q3umq