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Transmitter, receiver, and transmitting method

a technology of transmitter and receiver, applied in the field of transmitter, receiver, and transmitting method, can solve the problems of inability to protect copyrights, the inability to move contents normally, and the inability to perform normal moving of contents

Inactive Publication Date: 2007-08-30
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention relates to a system for transmitting and receiving content with copyright protection. The technical effect of the invention is to prevent unauthorized copying of content during transmission and to ensure that the content is moved without being copied in a different device. The invention also includes a method for sharing keys among multiple receivers to simultaneously distribute the same content. The invention addresses the issue of copyright infringement and ensures efficient communication with multiple receivers.

Problems solved by technology

However, moving the contents with the keys distributed to the plurality of receivers allows the plurality of receivers to decode the contents to be moved, so that the moving of the contents is not performed normally.
Like this, the occurrence of a situation in which the moving of the contents is not executed normally and their copyrights are not protected is possible in a conventional content transmitting / receiving system.

Method used

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  • Transmitter, receiver, and transmitting method
  • Transmitter, receiver, and transmitting method
  • Transmitter, receiver, and transmitting method

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0027]FIG. 1 is a block diagram illustrating a schematic configuration of a transmitter 100 according to the first embodiment. The transmitter 100, as shown in FIG. 1, comprises a content supplying unit 12, an authentication and key exchange processing unit 14, a content list management unit 16, a key selection processing unit 18, an encryption processing unit 20, a network interface processing unit 22, a connection management unit 24 for content transmission, a connection management unit 26 for content management, and a connection management unit 28 for an authentication and key exchange.

[0028] The content supplying unit 12 stores contents and a list thereof.

[0029] The authentication and key exchange processing unit 14 performs an authentication and a key exchange between the transmitter 100 and a receiver. The first embodiment, as shown in FIG. 2, allows existence of a plurality of receivers A, B and C (or D, and E) for one transmitter X (or Y). If authentication and key exchang...

second embodiment

[0089] The first embodiment is a model in which the receiver transmits the request in order to move and transmit the content to the transmitter side. A second embodiment is a model in which the transmitter requests so that the receiver receives the moved content.

[0090]FIG. 10 is a block diagram illustrating a schematic configuration of a transmitter 200 according to the second embodiment. The transmitter 200, as shown in FIG. 10, comprises the content supplying unit 12, authentication and key exchange processing unit 14, a content selecting unit 66, the key selection processing unit 18, encryption processing unit 20, network interface processing unit 22, connection management unit 24 for content transmission, connection management unit 26 for content management, and connection management unit 28 for authentication and key exchange.

[0091] The content supplying unit 12, authentication and key exchange processing unit 14, encryption processing unit 20, network interface processing un...

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PUM

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Abstract

According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2006-051200, filed Feb. 27, 2006, the entire contents of which are incorporated herein by reference. BACKGROUND [0002] 1. Field [0003] One embodiment of the invention relates to a transmitter, a receiver, and a transmitting method which transmits or receives a variety of contents requiring copyright protection. [0004] 2. Description of the Related Art [0005] With the spread of a computer network, such as a broadband and a wireless LAN, and with the progress of a digital technique, a product called digital information appliance (hereinafter referred to as digital household electric appliance) with a communication function has become widely used. As a terrestrial digital broadcasting has started, in the future, more diffusion of television receivers, set top boxes, DVD recorders, etc., corresponding to a digital broadcasting are predicte...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/167G06F13/00G06F21/10H04N7/16H04N21/418H04N21/441H04N21/6334H04N21/6377H04N21/835
CPCH04N7/1675H04N21/2347H04N21/25816H04N21/25875H04N21/26609H04N21/26613H04L63/0428H04N21/4623H04N21/4627H04N21/63345H04N21/6582H04N21/8355H04N21/4405
Inventor ISOZAKI, HIROSHICHAKI, HIROYUKIKONDA, KAZUNOBUKOKUBO, TAKASHIOHKITA, HIDEKI
Owner KK TOSHIBA