医疗传感网中身份匿名的隐私保护最值查询协议

摘要

As perception layer in the Internet of Things, medical sensor networks are being challenged for their privacy preservation.Designing anonymous privacy-preserving MAX/MIN query protocol has become a challenging problem.This paper introduces sensor nodes by using Z-O encoding and hash function to encrypt sensory data and users'identity.In such cases, storage node gets MAX/MIN query result without the informa-tion of the user's identity and clear data.Then the sink node computes the final query result and user identity when receiving the encrypted data from storage node.Theoretical analysis and protocol comparison demonstrate that, compared to available schemes, the proposed protocol has better privacy security.%医疗传感网作为物联网感知层,隐私保护问题越来越受到挑战. 其中设计具有用户身份匿名的隐私保护最值查询协议已成为富有挑战性的问题. 本文引入Z-O编码和哈希函数,对感知数据和用户身份标识进行加密处理,使存储节点在无法获知用户身份标识和感知数据明文的基础上完成最值查询,存储节点将得到的结果返回给Sink节点,由Sink得出最终的查询结果和用户身份标识. 理论分析和协议比较表明,与同类协议相比,该协议具有更好的隐私安全性.