The Research And Implementation Of Embedded Power Distribution Terminal Based On Trusted Computing

With the rapid development of computer technology and the rapid advance of smart grid construction, more and more power distribution terminal as a key device of the power system is widely used in the smart grid. Although the introduction of the power distribution terminal brings many advantages such as convenience, etc., they are susceptible to all kinds of information security. The security study of the embedded distribution terminals has important practical significance.Trusted Computing technology as an information security solution, provides a good idea for the embedded power distribution terminal security. By researching the existing trusted startup process and the integrity measurement, this paper proposes a common trusted startup process in the terminal platform adding test signature function.Based on the static integrity measurement of trusted computing, this paper proposes an integrity measurement mechanism which combined static integrity measurement and dynamic integrity measurement for the distribution power terminals.This method measures the integrity of the process as the measurement unit.Based on the proposing start-up process and the integrity measurement model of trusted computing, this paper designs the hardware and software of the trusted embedded distribution terminal and realizes part of the function. Choosing the 32bitMIPS core CPU as the trusting chip’s processor, and designing the trusting chip’s pins. Embedded trusted software stack, file encryption module, access control module and security policy management module are applied to embedded trusting power distribution terminal in the software to improve the credibility and security. Finally, results of tests based on the embedded trusted software for function and performance show that the trusted software has good reliability.