摘要
为了提高在数据库中查询加密字符串数据的性能,提出一种新的基于对偶特征码的快速查询方法。特征码与加密字符串数据一一对应,作为索引保存在索引字段中。查询时使用两阶段查询策略,首先利用索引字段对加密数据进行一次粗糙查询以过滤掉与查询不相关的记录,然后在解密的数据上再进行一次精确查询,对粗糙查询结果进行二次过滤,得到符合查询条件的记录。实验表明,该方法的性能比现有查询方法有较大提高。
To improve the performance of querying encrypted character data in database,this paper proposed an approach based on characteristic code of pairs coding that generated characteristic codes for encrypted data as index stored in an index field.When querying the encrypted character data,applied the principle of two-phase query.In the first place,implemented a coarse query over the encrypted data to filter the records which not related to the querying conditions.Then decrypted the rest records and implemented a...
出处
《计算机应用研究》
CSCD
北大核心
2009年第2期736-738,共3页
Application Research of Computers
关键词
数据库加密
加密字符串查询
对偶特征码
两阶段查询
database encryption
query over encrypted character data
pairs characteristic codes
two-phase query
