Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate
1997-11-26
2001-01-09
Urban, Edward F. (Department: 2746)
Telecommunications
Radiotelephone system
Security or fraud prevention
C455S558000, C455S550100
Reexamination Certificate
active
06173172
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a technology for preventing a telephone number of a regular subscriber in a so-called mobile communication device such as a portable telephone, automobile telephone, and a personal handy phone (PHS) and thereby avoiding an accounting associated with a communication therefrom.
2. Description of the Related Art
In a mobile communication of a portable telephone and an automobile telephone and the like, in order to manage a location information of a communication device and an accounting of a communication fee, it is necessary to transmit the information of a unique identification information of a communication device (SID) and a unique identification information of a subscriber (PID) and the like to a relay station, and the relay station which as received these information will send out a calling signal composed of these identification information and an identification number of a specified telephone call channel to an exchange station. The exchange station will isolate a home memory station of a subscriber from these identification information, then by accessing the subscriber data, will check to see whether it is a regular subscriber who may be allowed to connect. When it is judged of to be connectable, then that telephone call will be permitted.
According to these conventional methods, there have been existed some dangers of being communicated unlawfully with producing a replica, by receiving a dispatched information for the mobile device, deciphering the identification of the SID and PID and the like, then transporting said information to a completely different portable telephone. The encryptions, which will make the decryptions of these dispatched information difficult, have been studied, but prevention of the information decryptions with encryptions has a limitation.
SUMMARY OF THE INVENTION
An object of the present invention is to provide means for disabling a communication of other than a regular subscriber, even when necessary information for communication has been unlawfully obtained, such as the unique identification information as the communication device (SID) and the unique identification information as the subscriber (PID) and the like.
The present invention is a method and a means, in the mobile communication device of the portable telephone and the automobile telephone and the like, for storing a first identification information derived from the unique identification information as the communication device provided to each communication device and the unique identification information as the subscriber provided to each subscriber, for deriving a second identification information from the unique identification information as the communication device provided to each communication device and the unique identification information as the subscriber provided to each subscriber, at each time when implementing a communication, for comparing the first identification information and the second identification information, and for permitting a use thereof when these are matched, thereby preventing a use of a mobile communication device produced unlawfully, including:
a method of preventing a unauthorized use of a mobile communication device, comprising;
storing at least a unique identification information as a communication device, a unique identification information as a subscriber, and a first identification information derived from the unique identification information as the communication device and the unique identification information as the subscriber into a memory area of a mobile communication device;
deriving a second identification information from the unique identification information as the communication device and the unique identification information as the subscriber being stored, at a time when using said communication device;
comparing the first identification information being stored in said communication device and the second identification information derived from a means for deriving the second identification information; and
permitting a use of said communication device when they have matched, and
a unauthorized use prevention system of a mobile communication device of a portable telephone and the like, comprising:
a mobile communication device into which at least a unique identification information as a communication device, a unique identification information as a subscriber, and a first identification information derived from the unique identification information as the communication device and the unique identification information as the subscriber are being stored;
means for reading stored information;
means for deriving a second identification information from the unique identification information as the communication device and the unique identification information as the subscriber being stored in said mobile communication device;
means for comparing the first identification information being stored in said communication device and the second identification information derived from said means for deriving the second identification information; and
means for permitting a use of said communication device when a result of comparison by said means for comparing has matched, and a method of preventing a unauthorized use of a mobile communication device, and a unauthorized use prevention system of a mobile communication device, wherein when a result of comparing the first identification information and the second identification information has not matched, then disabling a use of said communication device thereafter.
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Masuda Hidehiro
Mochizuki Yasuaki
Morrison & Foerster / LLP
Nippon Shinpan Co., Ltd.
Urban Edward F.
LandOfFree
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