| 摘要 |
PURPOSE:To easily detect computer virus hidden in the free area of a program. CONSTITUTION:When it is guarnteed that the program of a diagnostic object is not infected with the computer virus, the area of the program read into a memory is equally divided into (n) pieces of small areas, data Dsi of an arbitrary data length Lsi indicated by an arbitrary address Ai in each small area are read out, and these kinds of information are preserved in a different recording medium as diagnostic information. At the time of diagnosis, the program and the diagnostic information are read out onto the memory, the data of a length indicated by each data length from the position indicated by each address on the memory are respectively read out, these data are compared with the respective data of diagnostic information and when inequality is found, it is judged that the program is infected with the computer virus. |
