To provide a mechanism for sharing data among a plurality of programs, while keeping security of data to be stored.
A plurality of data servers 2 distribute a plurality of programs to a mobile apparatus 3 via a mobile packet communication network 1. In this case, at least one data server 2 transmits information to the mobile apparatus 3, by which correspondence to the program capable of sharing data among a plurality of programs is determined. When the program is downloaded, the mobile apparatus 3 assigns a memory area exclusive to the program. The apparatus 3 writes data to be shared with another program into the memory area to be accessible under the execution of a plurality of programs. Besides, the mobile apparatus 3 performs an authentication processing by referring to determination information corresponding to the program under execution, when reading data from the memory area to be accessible under the performance of a plurality of programs.
COPYRIGHT: (C)2004,JPO&NCIPI
| JP2854609 | [Title of Invention] Portable Electronic Device |
| JPS63189956 | DATA PROCESSOR |
| JP4292736 | Transmission system, transmission method |
Kazuhiro Yamada
Takashi Kondo
| JP1025263A | ||||
| JP2002073196A | ||||
| JP2002163111A | ||||
| JP2002223272A |
| WO2002093361A1 | ||||
| WO2002075531A1 |
Takashi Matsumoto