期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2013
卷号：4
期号：8-3
出版社：Seventh Sense Research Group
摘要：This paper presents the Secure Routing uses Trust Levels (SRT) scheme in Node transition probability (NTP) protocol to provide secure routing in mobile ad hoc networks based on hierarchical trust levels. In this scheme, the nodes in the network fall into one of the three lists; ally list, associate list and acquaintance list based on the degree of trust. The trust calculation process involves grouping of nodes in the network based on the parameter called Trust rate . Based on the level of security needed for the data, the nodes in a specific security level are made active for routing depending on their trust value. This scheme does not use any key management technique. Trust is compromised, only if secured neighbors are not available. In this case, the route is established by choosing the nodes in the next lower level. It improves the packet delivery ratio by reducing endtoend delay. We also presented HADOF, which is a set of mechanisms to defend against routing disruptions in mobile ad hoc networks. Based on the observed behavior and the history record of each node, HADOF aims to detect and punish malicious nodes, and improve network performance. Since malicious nodes may submit false report, for each node, the next mechanism is to keep a cheating record database for the other nodes. If a node is detected as dishonest, this node will be excluded from the future routes, and its packets will not be forwarded by other nodes as punishment. Both analysis and extensive simulation confirmed the effectiveness of these mechanisms, which introduce little overhead to the existing routing protocols and can handle various attacks very well.
关键词：MANET; Node transition probability protocol; Trust Levels (SRT) ; HADOF
