IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0515932
(2006-09-06)
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등록번호 |
US-9177170
(2015-11-03)
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우선권정보 |
JP-2005-269050 (2005-09-15); JP-2006-231122 (2006-08-28) |
발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
12 |
초록
▼
A content encryption device generates encrypted content and an encrypted content copying device copies the encrypted content on an information storage medium. The storage medium is sold at a charge or distributed at no charge. A user gets the storage medium to connect the storage medium to a user te
A content encryption device generates encrypted content and an encrypted content copying device copies the encrypted content on an information storage medium. The storage medium is sold at a charge or distributed at no charge. A user gets the storage medium to connect the storage medium to a user terminal device or set the storage medium in a user terminal device, accesses to a content key distribution device to present a part or a whole of medium information of the storage medium to the distribution device. The distribution device grasps the whole of the medium information of the copied medium together with copied content and makes a content key encryption device issue an encrypted content key on the basis of user presentation information and distributes it to the terminal device.
대표청구항
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1. An information provision system comprising: a content encryption circuit which acquires content key generation conditions and content information from a copyright owner or a copyright manager of content, generates a content key on the basis of the content key generation conditions, and encrypts t
1. An information provision system comprising: a content encryption circuit which acquires content key generation conditions and content information from a copyright owner or a copyright manager of content, generates a content key on the basis of the content key generation conditions, and encrypts the content information using the content key to generate encrypted content;a content information copying circuit which attaches content identification information identifying the content information and access destination information to the encrypted content, writes the encrypted content to an information storage medium with the content identification information and the access destination information attached to the encrypted content to generate a copied information storage medium, the information storage medium comprising medium information including medium key information and a unique identifier of the information storage medium, acquires the medium information from the information storage medium, attaches the content identification information to the acquired medium information, and issues the medium information and the content identification information attached to the medium information;a content key encryption circuit which stores the content key generated by the content encryption circuit; andan encrypted content key distribution circuit which acquires the medium information and the content identification information attached to the medium information that are issued by the content information copying circuit, stores the acquired medium information and the content identification information attached to the medium information, wherein;the encrypted content key distribution circuit receives a content viewing request from a user terminal device to which the copied information storage medium is set, receives medium information and content identification information written in the copied information storage medium from the user terminal device, compares the received medium information with the stored medium information issued by the content information copying circuit and, when the received medium information matches the stored medium information, sends the matched medium information with the received content identification information to the content key encryption circuit, acquires an encrypted content key from the content key encryption circuit, and distributes the encrypted content key from the content key encryption circuit to the user terminal device via a communication line,the content key encryption circuit receives the matched medium information and the content identification information from the encrypted content key distribution circuit, acquires content key identified by the content identification information, and encrypts, the acquired content key with the received medium information or the received medium information and device unique information of the user terminal device presented from the user terminal device to generate the encrypted content key, andthe user terminal device reads out the access destination information from the copied information storage medium in accordance with the content viewing request, accesses, based on the access destination information, the encrypted content key distribution circuit via the communication line, presents the medium information and the content identification information stored in the copied information storage medium or the medium information, the content identification information, and the device unique information to the encrypted content key distribution circuit, acquires the encrypted content key from the encrypted content key distribution circuit, decrypts the encrypted content key with the medium information, and decrypts the encrypted content stored in the copied information storage medium with the decrypted content key. 2. A content information copying device of an information provision system, the system comprising: a content encryption circuit which acquires content key generation conditions and content information from a copyright owner or a copyright manager of content, generates a content key on the basis of the content key generation conditions, and encrypts the content information using the content key to generate an encrypted content;a content information copying circuit which attaches content identification information identifying the content information and access destination information to the encrypted content, writes the encrypted content to an information storage medium with the content identification information and the access destination information attached to the encrypted content to generate a copied information storage medium, the information storage medium comprising medium information including medium key information and a unique identifier of the information storage medium, acquires the medium information from the information storage medium, attaches the content identification information to the acquired medium information, and issues the medium information and the content identification information attached to the medium information;a content key encryption circuit which stores the content key generated by the content encryption circuit; andan encrypted content key distribution circuit which acquires the medium information and the content identification information attached to the medium information that are issued by the content information copying circuit, stores the acquired medium information and the content identification information attached to the medium information, wherein:the encrypted content key distribution circuit receives a content viewing request from a user terminal device to which the copied information storage medium is set, receives medium information and content identification information written in the copied information storage medium from the user terminal device, compares the received medium information with the stored medium information issued by the content information copying circuit and, when the received medium information matches the stored medium information, sends the matched medium information with the received content identification information to the content key encryption circuit, acquires an encrypted content key from the content key encryption circuit, and distributes the encrypted content key from the content key encryption circuit to the user terminal device via a communication line,the content key encryption circuit receives the matched medium information and the content identification information from the encrypted content key distribution circuit, acquires a content key identified by the content identification information, and encrypts the acquired content key with the received medium information or the received medium information and device unique information of the user terminal device presented from the user terminal device to generate the encrypted content key;wherein the content information copying device comprises: an encrypted content storage unit which stores the encrypted content generated from the content encryption circuit;a copy processing unit which reads out encrypted content from the encrypted content storage unit and writes it into the information storage medium with the medium information written therein to create a copy of the encrypted content on the information storage medium; anda medium information issuing unit which transmits medium information of the information storage medium with the encrypted content copied thereon to the encrypted content key distribution circuit to store it therein;wherein the user terminal device reads out access destination from the copied information storage medium in accordance with the content viewing request, and accesses, based on the access destination information, the encrypted content key distribution circuit. 3. A user terminal device which is used for an information provision system comprising: a content encryption circuit which acquires content key generation conditions and content information from a copyright owner or a copyright manager of content, generates a content key on the basis of the content key generation conditions, and encrypts the content information using the content key to generate an encrypted content;a content information copying circuit which attaches content identification information identifying the content information and access destination information to the encrypted content, writes the encrypted content to an information storage medium with the content identification information and the access destination information attached to the encrypted content to generate a copied information storage medium, the information storage medium comprising medium information including medium key information and a unique identifier of the information storage medium, acquires the medium information from the information storage medium, attaches the content identification information to the acquired medium information, and issues the medium information and the content identification information attached to the medium information;a content key encryption circuit which stores the content key generated by the content encryption circuit; andan encrypted content key distribution circuit which acquires the medium information and the content identification information attached to the medium information issued by the content information copying circuit, stores the acquired medium information and the content identification information attached to the medium information, wherein:the encrypted content key distribution circuit receives a content viewing request from the user terminal device to which the copied information storage medium is set, receives medium information and content identification information written in the copied information storage medium from the user terminal device, compares the received medium information with the stored medium information issued by the content information copying circuit and, when the received medium information matches the stored medium information, sends the matched medium information with the received content identification information to the content key encryption circuit, acquires an encrypted content key from the content key encryption circuit, and distributes the encrypted content key from the content key encryption circuit to the user terminal device via a communication line,the content key encryption circuit receives the matched medium information and the content identification information from the encrypted content key distribution circuit acquires a content key identified by the content identification information, and encrypts the acquired content key with the received medium information or the received medium information and device unique information of the user terminal device presented from the user terminal device to generate the encrypted content key;wherein the user terminal device is configured to: access the encrypted content key distribution circuit via the communication line in viewing the copied information storage medium;acquire the encrypted content key distributed from the encrypted content key distribution circuit by presenting the medium information stored in the copied information storage medium, or present the medium information and the device unique information;decrypt the encrypted content key on the basis of the medium information stored in the copied information storage medium, or of the medium information and the device unique information; andreproduce the encrypted content recorded on the copied information storage medium by using the decrypted content key;wherein the user terminal device reads out access destination information from the copied information storage medium in accordance with the content viewing request, and accesses, based on the access destination information, the encrypted content key distribution circuit. 4. A user management device of an information provision system, which is used for the information provision system allowing a user terminal device which enables reproducing content information from an information storage medium with the content information written therein together with at least medium information of a medium unique identifier and medium key information written therein, the system being composed of: a content encryption circuit which acquires content key generation conditions and content information from a copyright owner or a copyright manager of content, generates a content key on the basis of the content key generation conditions, and encrypts the content information using the content key to generate an encrypted content;a content information copying circuit which attaches content identification information identifying the content information and access destination information to the encrypted content, writes the encrypted content to an information storage medium with the content identification information and the access destination information attached to the encrypted content to generate a copied information storage medium, the information storage medium comprising medium information including medium key information and a unique identifier of the information storage medium, acquires the medium information from the information storage medium, attaches the content identification information to the acquired medium information, and issues the medium information and the content identification information attached to the medium information;a content key encryption circuit which stores the content key generated by the content encryption circuit; andan encrypted content key distribution circuit which acquires the medium information and the content identification information attached to the medium information issued by the content information copying circuit, stores the acquired medium information and the content identification information attached to the medium information, wherein:the encrypted content key distribution, circuit receives a content viewing request from user terminal device to which the copied information storage medium is set, receives medium information and content identification information written in the copied information storage medium from the user terminal device, compares the received medium information with the stored medium information issued by the content information copying circuit and, when the received medium information matches the stored medium information, sends the matched medium information with the received content identification information to the content key encryption circuit, acquires an encrypted content key from the content key encryption circuit, and distributes the encrypted content key from the key encryption circuit to the user terminal device via a communication line,the content key encryption circuit receives the matched medium information and the content identification information from the encrypted content key distribution circuit, acquires a content key identified by the content identification information, and encrypts the acquired content key with the received medium information or the received medium information and device unique information of the user terminal device presented from the user terminal device to generate the content key;wherein the management device comprises a user information storage for storing user information of an encrypted content key distribution destination of the encrypted content key distribution circuit;wherein the user terminal device reads out access destination information from the copied information storage medium in accordance with the content viewing request, and accesses, based on the access destination information, the encrypted content key distribution circuit. 5. The user management device of the information provision system according to claim 4, being further configured to: perform charging processing to the user terminal device in distributing the encrypted content key from the encrypted content key distribution circuit. 6. The user management device of the information provision system according to claim 5, wherein the corresponding encrypted content key is distributed to the encrypted content key distribution circuit after receiving a settlement by electronic money.
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