Method and apparatus for transmitting content to device which does not join domain
First Claim
1. A method of transmitting content from a first device which joins a domain to a second device which does not join the domain, the method comprising:
- determining at the first device whether adjacency exists between the first device and the second device;
encrypting a content key corresponding to the content to be transmitted to the second device using a key of the second device, according to a result of the determining whether adjacency exists between the first device and the second device; and
transmitting the encrypted content key and the content from the first device to the second device.
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Accused Products
Abstract
A method and an apparatus for transmitting content from a first device that joins a domain to a second device that does not join the domain are provided. If the second device which does not join the domain is adjacent to the first device which joins the domain, by encrypting a content key corresponding to the content to be transmitted to the second device which does not join the domain using a key of the second device which does not join the domain, and then transmitting the content and the encrypted content key to the second device which does not join the domain, the second device which does not join the domain can use the content having an access authority limitation, which can be used by only devices which join the domain.
28 Citations
40 Claims
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1. A method of transmitting content from a first device which joins a domain to a second device which does not join the domain, the method comprising:
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determining at the first device whether adjacency exists between the first device and the second device; encrypting a content key corresponding to the content to be transmitted to the second device using a key of the second device, according to a result of the determining whether adjacency exists between the first device and the second device; and transmitting the encrypted content key and the content from the first device to the second device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer-readable recording medium storing a computer program for executing a method of transmitting content from a first device which joins a domain to a second device which does not join the domain, the method comprising:
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determining at the first device whether adjacency exists between the first device and the second device; encrypting a content key corresponding to the content to be transmitted to the second device using a key of the second device, according to a result of the determining whether adjacency exists between the first device and the second device; and transmitting the encrypted content key and the content from the first device to the second device. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of allowing a second device which does not join a domain to receive content from a first device which joins the domain, the method comprising:
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determining whether adjacency exists between the first device and the second device; and receiving the content and a content key corresponding to the content encrypted using a key of the second device, from the first device, according to a result of the determining whether adjacency exists between the first device and the second device. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A computer-readable recording medium storing a computer program for executing a method of allowing a second device which does not join a domain to receive content from a first device which joins the domain, the method comprising:
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determining at the second device whether adjacency exists between the first device and the second device; and receiving the content and a content key corresponding to the content encrypted using a key of the second device, from the first device, according to a result of the determining whether adjacency exists between the first device and the second device. - View Dependent Claims (23, 24, 25, 26, 27)
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28. An apparatus for transmitting content to a device which does not join a domain, the apparatus comprising:
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an adjacency checking unit which determines adjacency to the device; an encryption unit which encrypts a content key corresponding to the content to be transmitted to the device, using a key of the device, according to an adjacency determination result of the adjacent checking unit; and a transmitting unit which transmits the content key encrypted by the encryption unit and the content corresponding to the content key to the device. - View Dependent Claims (29, 30, 31, 32)
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33. An apparatus for receiving content from a device which joins a domain, the apparatus comprising:
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an adjacency checking unit which determines adjacency to the device; and a receiver which receives a content key encrypted using a key of the apparatus and the content corresponding to the content key, according to an adjacency determination result of the adjacency checking unit. - View Dependent Claims (34, 35, 36, 37)
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38. A method of transmitting content from a first device to a second device, the method comprising:
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receiving a content request from the second device; determining whether the second device does not join a domain of the first device; determining whether transmittance of the content is allowed on the basis of a license of the content if the second device does not join the domain of the first device; measuring a physical distance from the first device to the second device; and transmitting the content to the second device according to a result of the measuring of the physical distance. - View Dependent Claims (39, 40)
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Specification