Abstract: The current encryption strategy of the hard disk partition,which has slow encryption speed and low security,can only encrypt data and it cannot encrypt internet applications.In order to solve this problem,we design the mixed encryption strategy that is a new encryption technique of hard disk partition combined AES and RSA.With AES,the encryption can be quicker and safer.With RSA,the key can be distributed more safely.The encryption technique,which encrypt data or internet applications in drive layer,can upgrade the speed of encryption and realize the transparence of manipulation to users.In order to enhance the system security,the encryption technique associates users with keys by designing the digital certification and the key module.