Protection of authentication information of PHS mobile telephone

Abstract

A method for protecting authentication information stored in PHS mobile phone includes following steps: 1) the write terminal writes the authentication information into the memory of mobile phone at normal procedure; 2) the PHS mobile phone makes encryption for the plaintext of authentication information as making first authentication, and replaces the information plaintext by cryptograph of authentication information; 3) makes decryption, when the PHS mobile phone starts up, makes decryption operation for the authentication cryptograph. When making encryption and decryption, an encryption key and a decryption key in key pair that is only corresponding to a certain chip in mobile phone are used. The method can be farthest compatible with current write phone number method of PHS mobile phone, and can prevent the authentication information from illegally stealing.

Description

technical field [0001] The invention relates to a PHS mobile phone, in particular to a method for protecting authentication information of a PHS mobile phone. Background technique [0002] Currently commercial mobile communication systems mainly include CDMA system, GSM system and PHS system. Correspondingly, there are three kinds of mobile terminals: CDMA mobile phone, GSM mobile phone and PHS mobile phone. Parallel usually refers to the situation where more than one mobile phone uses the same mobile phone number. Both CDMA mobile phones and GSM mobile phones use the machine-card separation technology to realize the confidential processing of mobile phone authentication information, which can effectively prevent the occurrence of parallel machines. [0003] However, the PHS mobile phones currently in use (commonly known as wireless access handsets, wireless local telephones or PHS) do not use machine-card separation technology, but use number writers to directly write sens...

AI Technical Summary

Problems solved by technology

If someone rewrites the obtained information on other PHS terminals, so that multiple users use the same user number, this will form an illegal parallel phenomenon, which will cause serious harm to real consumers and PHS network operators. great loss

This technical defect is inherent in the design of PHS mobile phones. In the current application, no effective technical solution that can properly solve this problem has been found, and no open technical literature for this specific technical problem has been found.

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