Researchers on security database concern more and more the security threats from DBA(database administrator)

for its resulting in increasing crime to internet commercial databases which exist in the mode of ASP(Application service provider) recently

and its theoretic and technical hardness.Traditional access control could not provide enough security for the purpose

cryptographic security database becomes a promising scheme favored by its computing complexity of mathematical difficulties.We analyse various and up to date security threats to distributed database application systems

and give an overview for cryptographic access control and encryption database technology.Each class and approach is described and evaluated with its cryptographic principle

algorithm characters and positive and negative performance.We focus on the term of cryptanalysis of the schemes

which is considered the crucial points of the technology.