Mobile telephone with function to prevent illegal use and method and system for preventing illegal use of mobile telephone using the function
First Claim
1. A method of preventing illegal use of a mobile telephone, comprising the steps of:
- repeatedly originating a call to said mobile telephone over a wireless path;
when the call is received by said mobile telephone over the wireless path so that a communication channel is established, transmitting a destruction code including a cryptographic data to said mobile telephone;
said mobile telephone receiving the destruction code and comparing the cryptographic data of the received destruction code with a preset data stored in said mobile telephone to determine whether both the data are matched; and
said mobile telephone destroying a telephone functioning information stored in said mobile telephone when it is determined that both the data are matched, said telephone functioning information being information necessary for performing communication.
1 Assignment
0 Petitions
Accused Products
Abstract
In order to prevent illegal use of a mobile telephone, a call is repeatedly originated from a telephone or base station to the mobile telephone over a wireless path. When the call is received by the mobile telephone over the wireless path so that a communication channel is established, a destruction code including a cryptographic data is transmitted from the telephone or base station to said mobile telephone. The mobile telephone receives the destruction code and compares the cryptographic data of the received destruction code with a preset data stored in the mobile telephone to determine whether both the data are matched. When it is determined that both the data are matched, the mobile telephone destroys a telephone functioning information stored in the mobile telephone and necessary for performing communication.
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Citations
14 Claims
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1. A method of preventing illegal use of a mobile telephone, comprising the steps of:
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repeatedly originating a call to said mobile telephone over a wireless path; when the call is received by said mobile telephone over the wireless path so that a communication channel is established, transmitting a destruction code including a cryptographic data to said mobile telephone; said mobile telephone receiving the destruction code and comparing the cryptographic data of the received destruction code with a preset data stored in said mobile telephone to determine whether both the data are matched; and said mobile telephone destroying a telephone functioning information stored in said mobile telephone when it is determined that both the data are matched, said telephone functioning information being information necessary for performing communication. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mobile telephone having an illegal use preventing function, comprising:
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a storage section for storing a telephone functioning information necessary for performing communication and a preset data; a first section for receiving a destruction code when a wireless communication channel is established and comparing the cryptographic data of the received destruction code with the preset data stored in the storing section to determine whether both the data are matched; and a second section for destroying the telephone functioning information stored in said storing section when it is determined that both the data are matched. - View Dependent Claims (9, 10, 11)
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12. A system for preventing illegal use of a mobile telephone, comprising a base station including:
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a switch; storage means for storing a plurality of sets of telephone number and cryptographic data; destruction instructing means for repeatedly originating a call to said mobile telephone over a wireless path via the switch in accordance with a traffic load on the switch, and for transmitting a destruction code including the cryptographic data for said mobile telephone via the switch, such that a telephone functioning information of said mobile telephone is destructed based on the cryptographic data, when the call is received by said mobile telephone so that a communication channel is established over the wireless path. - View Dependent Claims (13, 14)
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Specification