数据库驱动认知无线电的位置隐私保护与验证

Research on location privacy protection and verification of database-driven cognitive radio

针对数据库驱动认知无线电网络存在位置隐私泄露和GPS欺骗问题,设计了一种具有位置验证机制的基于双布谷鸟过滤器的位置隐私保护方案。该方案首先通过基站提供位置验证解决GPS欺骗问题,然后采用双布谷鸟过滤器解决位置隐私泄露问题,同时避免了由误警概率导致的接入被主用户占用频谱的风险。仿真结果表明该方案虽然在数据库端和认知用户端的开销比布谷鸟过滤器方案稍有增加,但比隐私保护的信息查询和频道使用方案在网格数为10 000时数据库端开销减少了18倍,并且无位置隐私泄露。

In order to solve the problems of location privacy disclosure and GPS spoofing in database-driven cognitive radio network,this paper designed a location privacy protection scheme,which based on double cuckoo filter and provided location verification mechanism.The scheme firstly solved the GPS spoofing problem by providing location verification through the base station,and then used the double cuckoo filter to solve the problem of location privacy leakage.At the same time,the scheme avoided the risk caused by the false positive rates,which would lead the users to access the channels that were occupied by primary users.The simulation results show that the overhead of the database and the cognitive client is slightly higher than that of the cuckoo filter,but the cost of the database is reduced by 18 times when the grid number is 10 000 compared to the private spectrum availability information retrieval and channel utilization scheme,and there is no location privacy disclosure.