An Efficient Secure Routing Protocol for Wireless Ad Hoc Networks

近來無線隨意網路中群體通訊是越來越明顯趨勢，這些在網路中群體之間會透過彼此路由相互溝通，然而當網路中群體數目越來越多的時候，在進行資料傳遞之前的認證佔整個傳輸過程一個很大的部份，而且群體的分布也會影響到傳輸的效率。我們建構了一種安全轉運路由機制來取代傳統的認證方式，這機制分成兩個階段，分別是建立安全通訊管道以及監督整個網路運作，來保證整個資料傳遞的安全性，同時省去認證以及只透過同群體之間路由的限制。從實驗的結果來看，我們這種方法在資料傳遞有較小的延遲、在能量上消耗的較少，能夠提升整個無線隨意網路的運作效率。Secure group-aware communications only transmit data among group members. However, group members might separate into several sub-groups due to the natural of location. It is necessary to allow relay by a un-trust friends. In this thesis, we proposed a secure relay scheme called AFRS. It integrates two phase schemes: one for end-to-end secure channel establishment and the other for relay behavior monitoring. The transmitted data would be protected under the end-to-end secure channel. Attacks of routing are monitored and provide a countermeasure in the monitoring phase. As the experimental results, AFRS provides an efficient way to relay data securely.1 Introduction 1 2 Background 5 2.1 Security Threats in Wireless Ad Hoc Network 5 2.2 Secure Ad Hoc On-Demand Vector Protocol 6 2.3 Diffie-Hellman Key Exchange 10 3 Authentication-Free Relay Scheme 11 3.1 Basic Assumption 11 3.2 The Proposed Authentication-Free Relay Scheme 12 3.2.1 Overview 12 3.2.2 Secure Channel Establishment 13 3.2.3 Monitor 15 4 Security and Performance Analysis 20 4.1 Security Analysis 20 4.2 Performance Analysis 23 4.2.1 Metrics 23 4.2.2 Simulation Result 25 5 Conclusion 31 Bibliography 3