Abstract:

In response to the physical attacks on the internal storage and offchip bus so as to ensure the safety of stored data, we propose a dynamic mechanism of critical data protection based on hardwaresoftware cooperation, which can extract userdefined key safety data, store them into the key safety area, and adopt dynamic integrity verification to examine whether the data has been tampered. Compared with the traditional way of protecting program memory data, the proposed method has the advantage of preventing attacks on the hardware and software, saving onchip and offchip memory, reducing the processing time and enhancing the safety performance.

Key words: program;critical safety data;hardware-software cooperation；dynamic protection