Reverse Engineering of Microprocessor Program Code

This paper has an experimental character. Theoretical backgrounds presented here allow creating a research method. The research focus on analysis of microprocessor voltage supply changes. Such analysis based on the presented research assumptions allowed for a rather high efficiency of decoding program without interference in the internal structure of microprocessor. The obtained results show, that there is a possibility of uncontrolled access to program codes. Thus, it is necessary to search for and develop appropriate methods used for protecting program.