The System Architecture and Security Structure of Trusted PDA

PDA as a handheld device,faced with a number of security issues.This paper describes the Trusted PDA architecture and security mechanism by using the method of Trusted Computing.Firstly this paper proposes a "star-style" chain of trusted structure with data recovery functions,and it owns more safety,efficiency and reliability than the TCG trust structure.On this basis,the further use of technologies such as bus arbitration system constructs a trusted structural model of PDA.The paper also proposes and implements a security enhanced embedded operating system for the trusted PDA.Based on trusted platform,Trusted Network Connect(TNC),as well as SD cards full-disk encryption and other new security technologies and methods can be solved.On this basis,the authors have developed a trusted PDA-prototype system,and this PDA has reached all aspects of the technical requirements of the Trusted Computing Platform.