Scheme for transferring copyright protected contents data using radio link layer authentication/encryption
First Claim
1. A transmitting device for transmitting copyright protected contents data to a receiving device through radio communications, transmitting device comprising:
- a first authentication unit configured to carry out a first authentication with the receiving device, for judging whether the receiving device is a device that is allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key with the receiving device when the first authentication with the receiving device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication with the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key with the receiving device when the second authentication with the receiving device by the second authentication unit is success; and
a communication unit configured to transmit the contents data to the receiving device through an encrypted communication path which is encrypted by using the second encryption key and provided on the radio link layer.
1 Assignment
0 Petitions
Accused Products
Abstract
Between a transmitting device and a receiving device, a first authentication and key exchange procedure depending on a radio link layer network is carried out, and then a whole or a part of a second authentication and key exchange procedure depending on the copyright protected contents data is carried out by using the cipher communication using a first encryption key that is shared between the transmitting device and the receiving device by the first authentication and key exchange procedure, so that the contents data transfer by the cipher communication using a second encryption key can be carried out only between legitimate pair of the transmitting device and the receiving device that can successfully complete the first authentication.
119 Citations
22 Claims
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1. A transmitting device for transmitting copyright protected contents data to a receiving device through radio communications, transmitting device comprising:
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a first authentication unit configured to carry out a first authentication with the receiving device, for judging whether the receiving device is a device that is allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key with the receiving device when the first authentication with the receiving device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication with the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key with the receiving device when the second authentication with the receiving device by the second authentication unit is success; and
a communication unit configured to transmit the contents data to the receiving device through an encrypted communication path which is encrypted by using the second encryption key and provided on the radio link layer. - View Dependent Claims (2, 3, 4, 5)
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6. A transmitting device for transmitting copyright protected contents data to a receiving device through radio communications, transmitting device comprising:
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a first authentication unit configured to carry out a first authentication with the receiving device, for judging whether the receiving device is a device that is allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key with the receiving device when the first authentication with the receiving device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication with the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key with the receiving device when the second authentication with the receiving device by the second authentication unit is success; and
a communication unit configured to set up an encrypted communication path which is encrypted by using the second encryption key on the encrypted radio communication which is encrypted by using the first encryption key, and transmit the contents data to the receiving device through the encrypted communication path. - View Dependent Claims (7, 8, 9, 10)
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11. A receiving device for receiving copyright protected contents data transmitted from a transmitting device through radio communications, the receiving device comprising:
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a first authentication unit configured to carry out a first authentication with the transmitting device, for enabling the receiving device to operate as a device that is allowed to communicate with the transmitting device, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key with the transmitting device when the first authentication with the transmitting device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication with the transmitting device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key with the transmitting device when the second authentication with the transmitting device by the second authentication unit is success; and
a communication unit configured to receive the contents data transmitted from the transmitting device through an encrypted communication path which is encrypted by using the second encryption key and provided on the radio link layer. - View Dependent Claims (12, 13, 14, 16, 17, 18)
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15. A receiving device for receiving copyright protected contents data transmitted from a transmitting device through radio communications, the receiving device comprising:
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a first authentication unit configured to carry out a first authentication with the transmitting device, for enabling the receiving device to operate as a device that is allowed to communicate with the transmitting device, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key with the transmitting device when the first authentication with the transmitting device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication with the transmitting device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key with the transmitting device when the second authentication with the transmitting device by the second authentication unit is success; and
a communication unit configured to set up an encrypted communication path which is encrypted by using the second encryption key on the encrypted radio communication which is encrypted by using the first encryption key, and receive the contents data transmitted from the transmitting device through the encrypted communication path.
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19. A radio communication system, comprising a transmitting device for transmitting copyright protected contents data through radio communications, and a receiving device for receiving the contents data transmitted from the transmitting device, each one of the transmitting device and the receiving device having:
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a first authentication unit configured to carry out a first authentication between the transmitting device and the receiving device, for judging whether the transmitting device and the receiving device are devices that are allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key between the transmitting device and the receiving device when the first authentication between the transmitting device and the receiving device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication between the transmitting device and the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key between the transmitting device and the receiving device when the second authentication between the transmitting device and the receiving device by the second authentication unit is success; and
a communication unit configured to transfer the contents data from the transmitting device to the receiving device through an encrypted communication path which is encrypted by using the second encryption key and provided on the radio link layer.
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20. A radio communication system, comprising a transmitting device for transmitting copyright protected contents data through radio communications, and a receiving device for receiving the contents data transmitted from the transmitting device, each one of the transmitting device and the receiving device having:
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a first authentication unit configured to carry out a first authentication between the transmitting device and the receiving device, for judging whether the transmitting device and the receiving device are devices that are allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
a first key exchange unit configured to generate a first encryption key and share the first encryption key between the transmitting device and the receiving device when the first authentication between the transmitting device and the receiving device by the first authentication unit is success;
a second authentication unit configured to carry out a second authentication between the transmitting device and the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
a second key exchange unit configured to generate a second encryption key and share the second encryption key between the transmitting device and the receiving device when the second authentication between the transmitting device and the receiving device by the second authentication unit is success; and
a communication unit configured to set up an encrypted communication path which is encrypted by using the second encryption key on the encrypted radio communication which is encrypted by using the first encryption key, and transfer the contents data from the transmitting device to the receiving device through the encrypted communication path.
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21. A contents data transfer method in a radio communication system comprising a transmitting device for transmitting copyright protected contents data through radio communications and a receiving device for receiving the contents data transmitted from the transmitting device, the contents data transfer method comprising:
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carrying out a first authentication between the transmitting device and the receiving device, for judging whether the transmitting device and the receiving device are devices that are allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
generating a first encryption key and sharing the first encryption key between the transmitting device and the receiving device when the first authentication between the transmitting device and the receiving device is success;
carrying out a second authentication between the transmitting device and the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
generating a second encryption key and sharing the second encryption key between the transmitting device and the receiving device when the second authentication between the transmitting device and the receiving device is success; and
transferring the contents data from the transmitting device to the receiving device through an encrypted communication path which is encrypted by using the second encryption key and provided on the radio link layer.
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22. A contents data transfer method in a radio communication system comprising a transmitting device for transmitting copyright protected contents data through radio communications and a receiving device for receiving the contents data transmitted from the transmitting device, the contents data transfer method comprising:
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carrying out a first authentication between the transmitting device and the receiving device, for judging whether the transmitting device and the receiving device are devices that are allowed to communicate with the transmitting device or not, on a radio link layer of the radio communications;
generating a first encryption key and sharing the first encryption key between the transmitting device and the receiving device when the first authentication between the transmitting device and the receiving device is success;
carrying out a second authentication between the transmitting device and the receiving device, for protecting copyright of the contents data to be transmitted, through an encrypted radio communication using the first encryption key;
generating a second encryption key and sharing the second encryption key between the transmitting device and the receiving device when the second authentication between the transmitting device and the receiving device is success; and
setting up an encrypted communication path which is encrypted by using the second encryption key on the encrypted radio communication which is encrypted by using the first encryption key, and transferring the contents data from the transmitting device to the receiving device through the encrypted communication path.
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Specification