【摘 要】
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In the harsh environment where node density is sparse.the slow-moving nodes cannot effectivelv utilize the encountering opportunities to realize the self-organized identity authentications.and do not
【出 处】
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第八届中国可信计算与信息安全学术会议
论文部分内容阅读
In the harsh environment where node density is sparse.the slow-moving nodes cannot effectivelv utilize the encountering opportunities to realize the self-organized identity authentications.and do not have the chance to join the network routing However.considering most of the communcationsin opportunistic networks are caused bv forwarding operations.there is no need to establish the complete mutual authentications for each conversation Accordingly.a novel trust management scheme is presented based on the information of behavior feedback.in order to complement the insufficiencv of identitv authentications Bv uhlizing the certificate chains based on social attributes.the mobile nodes build the local certificate graphs gradually to realize the web of "Identitv Trust- relationshhip.Meanwhile.the successors generate Verified Feedback Packets for each positive behavior.and consequently the -Behavior Trust- relationship is formed for slow-moving nodes Simulation result shows that.by implementing our trust scheme.the delivery probability and trust reconstruction ratio can be effectively improved when there are large numbers of compromised nodes.and it means that our trust management scheme can efficiently explore and filter the trust nodes for secure forwarding in opportunistic networks.
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