Research on the adaptive weighted mean algorithm for lightweight scheme of database encryption
Xiaoyan Wang1, Rui Sun2
COMPUTER MODELLING & NEW TECHNOLOGIES 2013 17(5A) 21-24
1 Henan Polytechnic, Department of Information Engineering, Zhengzhou, 450046, China
2 Henan Polytechnic, Department of Information Engineering, Zhengzhou, 450046, China
Database security is very important in an information system. Most database management systems (DBMS) use access control to protect database. But access control can't resist bypass threats. Database encryption can resist these threats well. Encrypting data can exist on different positions in a DBMS. This paper compares four database encryption schemes in DBMS and proposes six design criteria for database encryptions. According to these criteria, we implement a prototype in Postgre SQL compliance with the fourth scheme. Our design hasn't impact on other database functions and makes no changes on DBMS structure. So it is a good way to enhance database security especially existing DBMS. Finally, we compare performance of database between with encryption and without encryption. The downgrade of performance is little and tolerable.