In wireless sensor networks, a majority voting scheme is proposed by us to identify the suspicious node. We take the cluster-head as the counter and see attested node as the voter. The attested information will be collected and counted by the cluster-head. The final voting result that is generated by the majority voting principle decides on the authenticity of suspicious node. Through the theory and the computation deducing, it can be demonstrates that the credible rate of voting scheme can surpass 90% in heterogeneous sensor network. Thus, our voting scheme for detecting suspicious node is more accurate and more reliable. It helps to improve the security of wireless sensor networks.
Finding cached data in cooperative caching system for mobile ad-hoc networks is a very important in order to save the energy, bandwidth of communication and to improve accessibility of data. Because the address of cached node (destination) is unknown, the expanding ring search (ERS) methods in multi-hop wireless environment are not suitable for routing cooperative caching discovery in mobile ad-hoc networks. A new routing discovery protocol is presented base on improvement of ERS in this paper; it uses s RREQ , c RREQ and RREP messages, and controls overhead with hops k HS from requested node k to real source node as TTL value. The analytic result indicates that our protocol is more advantaged then traditional ERS like increment TTL in search times initiated by requested node and broadcast cost in packet forward.
RC5 receives a wide range of favor and support in security protocols of low-speed wireless networks (LSWN). In order to further study whether RC5 applies to LSWN, this paper simulates two kinds of LSWN model that includes RC5 algorithm and without RC5 algorithm through the OMNeT++ simulator. By comparing the performance of the two kinds of LSWN model, such as End-to-End Delay of the packet, Packet Loss Rate of the node, the experimental statistics prove that introducing RC5 only brings a little overhead into the whole network. Therefore, we consider that RC5 is fit to LSWN to provide security communication.
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