The Research On Financial Database Encryption Technology

Database encryption technology is a good method of realizing database information security.In this dissertation, we conduct research and probing on database encryption technology and its application according to some Financial Management System.In respect to Financial Cipher Database System configuration design,we adopt encryption mode in DBMS rind, and accomplish identification and data encryption etc..through adding encryption management program in client, and security deputy program between application and DBMS.As regards cryptographic algorithm,according to database encryption requirement for cryptosystem,we adopt block cipher,which is high intensity and fast,based on analysing and comparing several popular cryptographic algorithm;and resolve cipher message expansion problem through making improvement of block cipher with "cipher message whmovement".Key management is critical technic of realizing database encryption.In this dissertation,after analysing and comparing several popular key managemet scheme.we make improvement of Two-Phase key management scheme according to the matter of fact,and achieve Two-Phase key management scheme from user key to user class key and to data class key,through creating system table in database.At the same time,we work out key using sequence of chaotic nonlinear system.Chaotic sequence is complex and recalcitrant to analysis and unpredictableness,and it can offer good complexity and comparable randomness.Experiment result proves that using chaotic sequence can create good key.Cipher Message Database On Financial Management System based on this dissertation is an important sub-system of Financial Management System.It's of simple construction,and implement method is convenience.resolving the security problem of financial information ,and it worth some reference value to developing database security and secret system in MIS.