Portable terminal data and data initialization method

Abstract

PROBLEM TO BE SOLVED: To realize a portable terminal which easily encrypts and holds data supplied from an external apparatus in a data writing procedure on the initiative of the external apparatus. ŽSOLUTION: A memory controller 111 writes SO data received from an SO data reader-writer 100 in an EEPROM 13 according to a write address. A flag setting unit 112 sets up an encryption request flag 113 when the writing of the SO data ends. Based on the encryption request flag 113, an encrypter 114 encrypts specified data contained in the SO data held in the EEPROM 13. Ž

Description

technical field [0001] The present invention relates to portable terminals such as mobile phones, and more particularly to a portable terminal that holds data provided from an external device and a data setting method thereof. Background technique [0002] Conventionally, when a mobile phone is sold, data required for the use and maintenance of the mobile phone, such as data called SO data, is written into the mobile phone through a dedicated SO data read / write device in a sales store or the like. The mobile phone stores the SO data supplied by the SO reading / writing device in a writable nonvolatile memory such as EEPROM (Electrically Erasable Programmable ROM). As the SO data, there are, for example, a telephone number for the mobile phone, a verification key, a writing key, a reading key, and the like. The telephone number and the authentication key are necessary when using radio communication, for example, when the user makes a phone call. The authentication key is used...

AI Technical Summary

Problems solved by technology

However, since the writing target address and SO data are output from the SO data reading and writing device within the timing dominated by the SO data reading and writing device, it is difficult to realize the timing of encryption on the mobile phone side.

Moreover, since each write unit of data, for example, a write address of 1 byte, is specified, it is not easy to encrypt in units of SO data, such as tens of bytes, and write to the specified address.

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