Abstract: To solve the problem, the framework, various privacy threats and security needs of LBS in IoT are discussed, and a privacy-preserving model is designed which can protect privacy of real identity, physical location and service content in IoT. The privacy security model is realized by using Onion Routing algorithm and fully homomorphic encryption algorithm. The analysis shows that this model can realize identity anonymity, position protection, service encryption, etc., and can keep safe of LBS privacy in IoT.

Key words: Internet of Things, location based service, privacy-preserving, anonymous communication, fully homomorphic encryption

摘要： 为解决物联网空间内LBS服务的隐私安全问题，在分析物联网环境中的LBS服务框架的基础上，针对其面临的各种隐私安全威胁及安全需求，基于匿名通信原理和可计算加密思想设计了一种支持真实身份、实体位置和服务内容等LBS隐私保护的安全模型，提出采用Onion Routing算法和全同态加密算法实现该模型。模型实现算法的分析表明，该模型可实现身份匿名、位置保护、服务加密等，对物联网空间内LBS隐私具有很好的安全保护。

关键词: 物联网, 基于位置的服务, 隐私保护, 匿名通信, 全同态加密