| 摘要 |
PURPOSE:To prevent illegal use, the alteration of data, destruction or the runaway of a program by checking a certificate code, which is applied when a terminal is correct, in the case of write so as to judge whether there is any error in translation (compile) or not to download only a correct machine word program. CONSTITUTION:At a reader/writer 20, a compile means 21 compiles a source program, and a check means 22 checks compile error and program correctness. When the check means 22 does not detect any compile error or only when the source program is correct based on the proper terminal, a code apply means 23 applies the certificate code to an object program. At an IC card 10, a code discriminating means 11 discriminates the presence/absence of the certificate code concerning this object code, and a write means 12 loads down only the correct object program. Thus, illegal use or the like can be prevented. |
