In-vehicle communication system, communication method therefor, in-vehicle communication terminal, communication method therefor, program recording medium, and program
First Claim
1. An in-vehicle communication system consisting of first and second communication terminals connected with a wireless network, wherein said first communication terminal comprises:
- a content readout unit for reading contents required by said second communication terminal;
a content encryption unit for encrypting the contents read by said content readout unit using a first key acted on by identification information about a vehicle; and
a content transmission unit for sending the contents encrypted by said content encryption unit to said second communication terminal, and wherein said second communication terminal comprises;
a content reception unit for receiving the contents sent by said first communication terminal;
a content decryption unit for decrypting the contents received by said content reception unit using said first key; and
an output control unit for controlling outputting of the contents decrypted by said content decryption unit.
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Accused Products
Abstract
Display devices are connected with a content server mounted inside a vehicle by a wireless communication technology as stipulated in IEEE802.11b. The content server and display devices share common keys (encryption key and corresponding decryption key) acted on by key creation information consisting of information about the vehicle. The content server reads out stored contents according to requests from the display devices. The read contents are then encrypted using the encryption key shared with the display devices and sent to the display devices. The invention can be applied to a wireless communication system consisting of devices which communicate data by wireless communication technology within the vehicle.
56 Citations
32 Claims
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1. An in-vehicle communication system consisting of first and second communication terminals connected with a wireless network, wherein
said first communication terminal comprises: - a content readout unit for reading contents required by said second communication terminal;
a content encryption unit for encrypting the contents read by said content readout unit using a first key acted on by identification information about a vehicle; and
a content transmission unit for sending the contents encrypted by said content encryption unit to said second communication terminal, andwherein said second communication terminal comprises;
a content reception unit for receiving the contents sent by said first communication terminal;
a content decryption unit for decrypting the contents received by said content reception unit using said first key; and
an output control unit for controlling outputting of the contents decrypted by said content decryption unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a content readout unit for reading contents required by said second communication terminal;
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10. A communication method for an in-vehicle communication system consisting of first and second communication terminals connected with a wireless network, wherein said first communication terminal performs communications by reading out contents required by said second communication terminal, encrypting said read contents using a key acted on by identification information about a vehicle, and sending the encrypted contents to said second communication terminal, and
wherein said second communication terminal performs communications by receiving the contents sent from said first communication terminal, decrypting the received contents using said key, and controlling outputting of the decrypted contents.
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11. An in-vehicle communication terminal for performing communications with a different second in-vehicle communication terminal connected with a wireless network, the first-mentioned in-vehicle communication terminal comprising:
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a content readout unit for reading out contents required by said second in-vehicle communication terminal;
a content encryption unit for encrypting the contents read out by said content readout unit using a first key acted on by identification information about a vehicle; and
a content transmission unit for sending the contents encrypted by said content encryption unit to said second in-vehicle communication terminal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A communication method for an in-vehicle communication terminal for performing communications with a different second in-vehicle communication terminal connected with a wireless network, said method comprising the steps of:
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reading out contents required by said second in-vehicle communication terminal;
encrypting the read contents using a key acted on by identification information about a vehicle; and
sending the encrypted contents to said second in-vehicle communication terminal.
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21. A program recording medium on which a program for causing a computer to perform processing for performing communications with an in-vehicle communication terminal connected with a wireless network, said program comprising the steps of:
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reading out contents required by said in-vehicle communication terminal;
encrypting the read contents using a key acted on by identification information about a vehicle; and
sending the encrypted contents to said in-vehicle communication terminal.
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22. A program for causing a computer to perform processing for performing communications with an in-vehicle communication terminal connected with a wireless network, said program comprising the steps of:
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reading out contents required by said in-vehicle communication terminal;
encrypting the read contents using a key acted on by identification information about a vehicle; and
sending the encrypted contents to said in-vehicle communication terminal.
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23. An in-vehicle communication terminal for performing communications with a different second in-vehicle communication terminal connected with a wireless network, the first-mentioned in-vehicle communication terminal comprising:
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a content reception unit for receiving contents, which have been encrypted using a first key and which have been sent by said second in-vehicle communication terminal, the first key being acted on by identification information about a vehicle;
a content decryption unit for decrypting the contents received by said content reception unit using said first key; and
an output control unit for controlling outputting of the contents decrypted by said content decryption unit. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A communication method for an in-vehicle communication terminal for performing communications with a different second in-vehicle communication terminal connected with a wireless network, said communication method comprising the steps of:
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receiving contents which have been encrypted by said second in-vehicle communication terminal using a key acted on by identification information about a vehicle and which have been sent;
decrypting the received contents using said key; and
controlling outputting of the decrypted contents.
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31. A program recording medium on which a program is recorded, the program being used to cause a computer to perform processing for performing communications with an in-vehicle communication terminal connected with a wireless network, said program comprising the steps of:
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receiving contents which have been encrypted by said in-vehicle communication terminal using a key acted on by identification information about a vehicle and which have been sent;
decrypting the received contents using said key; and
controlling outputting of the decrypted contents.
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32. A program for causing a computer to perform processing for performing communications with an in-vehicle communication terminal connected with a wireless network, said program comprising the steps of:
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receiving contents which have been encrypted by said in-vehicle communication terminal using a key acted on by identification information about a vehicle and which have been sent;
decrypting the received contents using said key; and
controlling outputting of the decrypted contents.
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Specification