摘要： 针对兴趣点查询服务带来的隐私泄露问题,提出一种可验证查询用户身份的安全查询方案。利用群签名技术保证用户身份不被泄露,为服务提供商提供有效的用户身份验证方式。借助半可信查询代理实现用户网络地址匿名,通过固定查询使用的假点降低构造匿名区域的开销。实验结果表明,与假点位置选择方案相比,该方案对移动端的压力和通信开销更小。

关键词: 位置隐私保护, 兴趣点查询, 群签名, 准标识符, 固定基点

Abstract: Aiming at the problem of privacy leaking for Point of Interest(POI) query service,this paper proposes a new location privacy protection scheme.By using the group signature technology,this scheme not only can protect the user’s privacy of identity,but also can provide an efficient method to verify the identity of the user for Service Provider(SP).With the aid of Partially Trusted Query Agent(PTQA),it can also solve the leak problem of network address,which can be used to identify the actual user.It reduces the cost of anonymous area construction by fixing the points used by query.Experimental results show that it brings less stress on mobile terminals and has smaller communication overhead compared with Dummy Location Selection(DLS) scheme.

Key words: location privacy protection, Point of Interest(POI) query, group signature, quasi-identifier, fixed base point

中图分类号: 

• TP309