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针对现有的虚假数据过滤策略难以防范合法数据包被恶意节点选择性丢弃的问题,提出了防范数据包选择性丢弃的途中过滤策略.策略中每个节点保存其1跳和2跳邻居节点的身份标识及单向链密钥,转发的数据包中附加的是L个节点的最新单向链密钥,而不是像传统途中过滤策略那样附加消息认证码.通过通信节点之间的共同邻居节点监听,采用逐步认证的方式递交数据包.实验结果表明,该策略不仅可高效过滤虚假数据,而且可防范途中恶意节点选择性丢弃合法数据包.
Aiming at the problem that the existing fake data filtering strategy can not prevent the legitimate data packets from being discarded selectively by malicious nodes, a midway filtering strategy is proposed to prevent packets from being discarded selectively. Each node in the strategy saves its 1-hop and 2-hop neighbor nodes Identity and unidirectional chain key, the data packet to be forwarded is the L-node’s latest one-way chain key appended instead of the message authentication code appended as the traditional way of filtering policy.Through the common neighbor node between communication nodes Listening and submitting data packets by step by step authentication.The experimental results show that this strategy can not only filter false data efficiently, but also prevent malicious nodes from selectively discarding legitimate data packets.