基于支持快速查询的嵌入式数据库加密技术研究

Research on Embedded Database Encryption Technology Based on Supporting Fast Queries

针对密文数据库加密保护作用和快速查询难以兼顾的技术难点,提出一种基于最佳桶划分的嵌入式数据库加密技术,对需要加密的字符数据进行对应的查询和储存。方案以最佳桶划分的思路为基础,对索引字段相应的划分值做出提取,经过实验对比可知,以最佳桶划分为基础依据的嵌入式数据库加密技术,能够保证相对稳定的过滤效率,首次查询具有较高的命中率,在加密系统获得更好性能的同时,也能保证查询速率更高。

Aiming at the technical difficulties in balance of encryption protection and fast query for ciphertext database,an embedded database encryption technology based on optimal bucket partitioning is proposed to query and store the character data that needs to be encrypted accordingly.The scheme is based on the idea of optimal bucket partitioning and extracts the corresponding partition values of index fields.Through experimental comparison,the embedded database encryption technology based on optimal bucket partitioning can ensure relatively stable filtering efficiency with higher shooting rate in first query.In addition to better performance of the encryption system,the query rate can be ensured to be more efficient。