Abstract: The present invention provides a central processing unit for processing at least one encrypted software. The encrypted software comprises at least one encrypted software section. The encrypted software section is encrypted with a management key MK, and the MK being encrypted with a device key DK as a encrypted MK. The central processing unit comprises processing and cache unit, and cryptographic unit. The cryptographic unit comprises device key storage unit for storing the DK, a plurality of management key storage units for storing MKs, wherein each management key storage unit corresponding to a management key index MKI, and decryption unit. The decryption unit decrypts a encrypted MK with the DK to obtain a MK, stores the MK to a management key storage unit, and output a MKI corresponding to the management key storage unit, thus the MKI is used to correspond to the encrypted software section.

Abstract: An intelligent surrogate apparatus and method for enhancing the display output and interaction capability of a portable device. The apparatus comprises a communication interface for connecting the portable device and an display controller. In addition, the apparatus comprises a connection manager for establishing connection and managing data flows; a graphics data receiver for receiving structured graphics data output from an application running on the portable device via the communication interface and converting them to a corresponding graphic function invocation; and a windows manager which may invoke a graphic function library to organize application windows according to the graphic function invocation. The apparatus may comprise fully functional computer keyboard input and mouse input capability.