Abstract
Database is widely used in computer systems currently, and OLE DB is the main method for applications to access database on Microsoft's system. In order to store sensitive data in commercial database management system, application often encrypt the data before keeping it into database. UDF (User Defined Function) is helpful for applications in encrypting procedure, but it can't handle Lob (Long object) data. A secure OLE DB provider for enhancing user authentication and encrypting Lob data in database is proposed. By adding necessary attributes of user authentication and cipher algorithm to encrypt Lob data in OLE DB provider, the security of data stored in database is improved. Experiments show that the proposed OLE DB provider is transparent, efficient, easy to implement and reliable.
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