数据库中字符型数据的加密存储与查询

摘要

在归纳现有密文检索技术的基础上,提出一种针对字符型数据的加密存储与检索方案。采用两阶段查询法,通过构造索引字段存储敏感数据的结构信息,可使第一阶段的模糊查询过滤掉大部分无关记录,从而提高密文查询速率。实验结论显示,所提方案安全可用。%On the basis of summarizing existing cryptograph query technologies, an encrypuon storage and query scheme for character data is presented. The scheme adopts the two-phase query method. Through building a index field to store structure information of sensitive data, it makes coarse query of first phase can filter out the majority of irrelevant records, so it greatly improve the inquiry effectiveness. Results of a set of experiments validate the security and availability of this scheme.