Research of Identifier-Based Series Requiry Model in LBS
Yang Geng · Computer Technology and Development · 2011
In recent years,along with the rapid development of mobile computing technology and wireless devices,LBS privacy protection technology has been given a lot of attention.A lot of anonymity algorithms have been designed to protect the privacy of the mobile users.However,k-anonymity for location privacy and the l-diversity query mechanisms for privacy mechanisms are applicable only to a snapshot query(snapshot query),not suitable for continuous queries.If the existing static anonymous continuous query algorithm is directly applied,it will generate a lot of problems such as having a privacy disclosure,or an overwhelming work of anonymous servers.It presents a query model based on the query identifier.Define a continuous query identifier for each task,LBS returns the result of query to the anonymous server according to the query identifier.The attackers collect the same query identifier anonymity set.The attackers can infer the private information with comparison,which leads to user privacy disclosure.To address this sort of problems,set up many pairs of k-table in the anonymous server,whenever a user sends a query,the anonymous server query the table,randomly selecting a number as the query identifier from this table.Attackers can not collect every element of the anonymous set of a continuous query task with this way,so the user privacy can be well protected.