US 2009/0154694 A1 · CONTENTS MANAGEMENT SYSTEM, AND CONTENTS MANAGEMENT DEVICE

Abstract

Provided is a content management device, which is connected with a plurality of terminal devices for performing a content moving operation while considering the conveniences of the users of the individual terminal devices. The content management device comprises a content storage unit stored with one or more contents, a move information management unit stored with first range information indicating the partial or entire range of the content to be moved, a range information receiving unit for accepting second range information indicating the range requiring the move, from one terminal device, a judgement unit for deciding whether or not the range indicated by the first range information and the range indicated by the second range information overlap at least partially, and a control unit for permitting the required range to be moved to the terminal device, in case the decision by the judgement unit is NO.

Claims25

Dependent claims

1-27. (canceled)

A content management device which is connected to a plurality of terminal devices and moves a content to each of the terminal devices, the content management device comprising:

a content storage unit storing at least one content;
a move information management unit storing first range information including a first content identifier and a first range that are related to a content, a portion of which is in a move process to one of the terminal devices, the first content identifier being used for uniquely identifying the related content, and the first range corresponding to the portion;
a range information receiving unit operable to receive, from one of the terminal devices which requests a move of a portion of a content, second range information including a second content identifier and a second range, the second content identifier being used for uniquely identifying the content, the portion of which is requested to be moved, and the second range corresponding to the portion requested to be moved;
a judgement unit operable to make a judgement, using the first range information and the second range information, whether the first range and the second range overlap at least partially or not;
and
a control unit operable, if the judgement is negative, to permit the portion corresponding to the second range to be moved to the terminal device requesting the move.

3 more elements

A terminal device which receives a content from a content management device having the content, comprising:

a key sharing unit operable to share a session key with the content management device;
a range information generating unit operable to generate range information including content identification information and a range, the content identification information being used for uniquely identifying the content, a portion of which was requested to be moved, and the range corresponding to the portion;
an encryption unit operable to encrypt the range information with use of the session key;
a range information transmitting unit operable to transmit the encrypted range information to the content management device;
a key information receiving unit operable, if the portion is permitted by the content management device to be moved, to receive a move decryption key and key identification information, the move decryption key being used for decrypting the portion, and the key identification being used for uniquely identifying the move decryption key;
a move request transmitting unit operable to transmit a move request including the key identification information to the content management device;
a content receiving unit operable to receive, from the content management device, part or an entirety of the portion which has been encrypted;
a decryption unit operable to decrypt the part or the entirety of the encrypted portion in accordance with the move decryption key;
a reception completion range notification unit operable to notify the content management device of a range of the part or the entirety, a reception of which is completed;
an invalidation notification reception unit operable to receive, from the content management device, an invalidation notification indicating that use of the part or the entirety in the content management device is invalidated;
and
a validation unit operable to validate, upon reception of the invalidation notification, use of the part or the entirety.

9 more elements

A content management system which moves a content from a content management device to a plurality of terminal devices, wherein

the content management device includes:
a content storage unit storing at least one content;
a move information management unit storing first range information including a first content identifier and a first range that are related to a content, a portion of which is in a move process to one of the terminal devices, the first content identifier being used for uniquely identifying the related content, and the first range corresponding to the portion;
a range information receiving unit operable to receive, from one of the terminal devices which requests a move of a portion of a content, second range information including a second content identifier and a second range, the second content identifier being used for uniquely identifying the content, the portion of which is requested to be moved, and the second range corresponding to the portion requested to be moved;
a judgement unit operable to make a judgement, using the first range information and the second range information, whether the first range and the second range overlap at least partially or not;
and
a control unit operable, if the judgement is negative, to permit the portion corresponding to the second range to be moved to the terminal device requesting the move, and
the terminal device requesting the move includes:
a second range information generating unit operable to generate the second range information;
a second range information transmitting unit operable to transmit the second range information to the content management device;
and
a content receiving unit operable to receive, from the content management device, the portion corresponding to the second range.

9 more elements

An integrated circuit included in a terminal device which receives a content from a content management device having the content, the integrated circuit comprising:

a key sharing unit operable to share a session key with the content management device;
a range information generating unit operable to generate range information including content identification information and a range, the content identification information being used for uniquely identifying the content, a portion of which was requested to be moved, and the range corresponding to the portion;
an encryption unit operable to encrypt the range information with use of the session key;
a range information transmitting unit operable to transmit the encrypted range information to the content management device;
a key information receiving unit operable, if the portion is permitted by the content management device to be moved, to receive a move decryption key and key identification information, the move decryption key being used for decrypting the portion, and the key identification being used for uniquely identifying the move decryption key;
a move request transmitting unit operable to transmit a move request including the key identification information to the content management device;
a content receiving unit operable to receive, from the content management device, part or an entirety of the portion which has been encrypted;
a decryption unit operable to decrypt the part or the entirety of the encrypted portion in accordance with the move decryption key;
a reception completion range notification unit operable to notify the content management device of a range of the part or the entirety, a reception of which is completed;
an invalidation notification reception unit operable to receive, from the content management device, an invalidation notification indicating that use of the part or the entirety in the content management device is invalidated;
and
a validation unit operable to validate, upon reception of the invalidation notification, use of the part or the entirety.

9 more elements

A content acquiring method used by a terminal device which receives a content from a content management device having the content, the content acquiring method comprising:

a key sharing step of sharing a session key with the content management device;
a range information generating step of generating range information including content identification information and a range, the content identification information being used for uniquely identifying the content, a portion of which was requested to be moved, and the range corresponding to the portion;
an encrypting step of encrypting the range information with use of the session key;
a range information transmitting step of transmitting the encrypted range information to the content management device;
a key information receiving step of receiving, if the portion is permitted by the content management device to be moved, a move decryption key and key identification information, the move decryption key being used for decrypting the portion, and the key identification being used for uniquely identifying the move decryption key;
a move request transmitting step of transmitting a move request including the key identification information to the content management device;
a content receiving step of receiving, from the content management device, part or an entirety of the portion which has been encrypted;
a decrypting step of decrypting the part or the entirety of the encrypted portion in accordance with the move decryption key;
a reception completion range notifying step of notifying the content management device of a range of the part or the entirety, a reception of which is completed;
an invalidation notification receiving step of receiving, from the content management device, an invalidation notification indicating that use of the part or the entirety in the content management device is invalidated;
and
a validating step of validating, upon reception of the invalidation notification, use of the part or the entirety.

9 more elements

Dependencies are inferred from the claim text.

Contents management system, and contents management device

Life of this patent

Contents management system, and contents management device

Life of this patent

Abstract

Claims25