基于Merkle哈希树的无线躯体传感器网络安全认证方案

Merkle Hash tree based security authentication scheme for WBSN

针对无线躯体传感器网络(WBSN)数据传输的安全性,提出一种融合Merkle哈希树和网络编码的轻量级认证方案。首先,将传感器网络构建成Merkle哈希树结构,只对根节点进行数字签名;然后,在哈希树中选择一个最优层进行网络编码,形成恢复数据包,并将数据包、签名和恢复包发送给接收器;最后,接收器通过密钥对根节点签名进行验证,若存在节点丢失,则根据恢复数据包重建哈希树,从而对数据进行认证。实验结果表明,该方案能够实现对数据的安全认证,且需要较少的网络开销,满足WBSN的性能需求。

Aiming at the data transmission security of the wireless body sensor network(WBSN),a lightweight authentica?tion scheme based on Merkle Hash tree and network coding is proposed. The sensor network was constructed as the Merkle Hash tree structure for digital signature only for the root node. An optimal layer in the Hash tree is chosen to conduct the network coding,form the recover data packet,and send the data packet,signature and recovery packet to the receiver. The root node signature was verified by the receiver via the key. If the node is missing,the Hash tree will be reconstructed according to the re?cover data packet to authenticate the data. The experimental results show that the scheme can realize the data security authenti?cation,needs less network overhead,and meets the performance requirement of WBSN.