Mobile communication terminal and data access control method

Abstract

This mobile communication terminal comprises a data storage portion for storing application data utilized when executing an application program, an application management portion for controlling the execution of the application program, and an authorization information storage portion accessible by the application management portion. In response to a request from the application program for saving application data in the data storage portion, the application management portion generates access authorization information related to the application data and stores it in the authorization information storage portion and, in the case of a request for access to the application data from the application program, refers to the access authorization information related to that application data, to approve the access request from the application program.

Description

technical field [0001] The invention relates to the technology of a mobile communication terminal and a data access control method. Background technique [0002] Conventionally, an operation of downloading an application program to a mobile communication terminal such as a mobile phone is performed. Among such application programs, there are programs that read out image data, music data, etc., and operate using these data, such as programs that display desired images on a monitor while waiting for reception. An example of a technique for controlling data access of such an application program is described in JP-A-2003-209814 as an access control method. [0003] In this access control method, when the television receiver receives broadcast data and receives access authority information, when an application operating in the television receiver accesses the broadcast data, it determines whether to allow the access based on the access authority information. . In this way, unw...

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional technology described above, since the access authority information is embedded in the broadcast data used by the application, when distinguishing the data format, there is a possibility that the access authority may be maliciously tampered with by an application.

In addition, it cannot be realized that when saving the data used in the execution of the program itself (obtained or generated data), access control is performed on the saved data for other applications

Furthermore, it is difficult to control other applications once the image data acquired from various servers by the application for receiving and waiting for image display, the image data generated by imaging with the built-in camera by the application for image editing, etc. are stored in the memory or the like. access to the data

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