| 摘要 |
The object of the present invention is to provide a semiconductor memory which is capable of executing multiple application programs and duplicating important data from one application program into another application program in security. An IC card ( 200 ) is one example of the semiconductor memory of the present invention, and is capable of executing multiple application programs. The IC card ( 200 ) includes: a memory area ( 331 ) for storing data relating to a library APL ( 301 ); a memory area ( 332 ) for storing data relating to a public pool APL ( 302 ); a security level setting unit ( 603 ) which identifies respective security levels of the library APL ( 301 ) and the public pool APL ( 302 ) for the data relating to these application programs, based on a criterion for identifying the security level of an application program for the data relating to it; and a data operation unit ( 608 ) which duplicates data A stored in the memory area ( 331 ) and stores the duplicated data A into the memory area ( 332 ), without taking the data A outside of the IC card ( 200 ), in the case where the relationship between the two security levels identified by the security level setting unit ( 603 ) meets a predetermined condition.
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