Source: http://www.google.com/patents/US7412060?ie=ISO-8859-1&dq=5579430
Timestamp: 2015-01-31 18:46:36
Document Index: 35754998

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Patent US7412060 - Contents data transmission/reception system, contents data transmitter ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn a contents data transmission/reception system, a contents data transmitter generates a plurality of key information, encrypts contents data by using one of the key information, transmits the key information through a plurality of signal routes to a contents data receiver, and then, transmits the encrypted...http://www.google.com/patents/US7412060?utm_source=gb-gplus-sharePatent US7412060 - Contents data transmission/reception system, contents data transmitter, contents data receiver and contents data transmission/reception methodAdvanced Patent SearchPublication numberUS7412060 B2Publication typeGrantApplication numberUS 10/800,688Publication dateAug 12, 2008Filing dateMar 16, 2004Priority dateMar 28, 2003Fee statusPaidAlso published asUS20040190723Publication number10800688, 800688, US 7412060 B2, US 7412060B2, US-B2-7412060, US7412060 B2, US7412060B2InventorsKeiichi FukudaOriginal AssigneeD&M Holdings Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (7), Non-Patent Citations (1), Referenced by (4), Classifications (32), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetContents data transmission/reception system, contents data transmitter, contents data receiver and contents data transmission/reception methodUS 7412060 B2Abstract In a contents data transmission/reception system, a contents data transmitter generates a plurality of key information, encrypts contents data by using one of the key information, transmits the key information through a plurality of signal routes to a contents data receiver, and then, transmits the encrypted contents data used by the key information through the signal routes to the contents data receiver. The contents data receiver receives the key information and the encrypted contents data transmitted from the contents data transmitter through the signal routes, and decrypts the encrypted contents data by using the key information.
CROSS REFERENCE TO RELATED APPLICATIONS The present application is a continuation-in-part of U.S. application Ser. No. 10/400,491 filed on Mar. 28, 2003 now U.S. Pat. No. 7,213,156, the disclosure of which is incorporated by reference herein.
BACKGROUND OF THE INVENTION The present invention relates to a contents data transmission/reception system in which contents data, such as audio data and video data, is transmitted and received between plural apparatuses, a contents data transmitter, a contents data receiver, and a contents data transmission/reception method.
SUMMARY The present invention has an object to provide a contents data transmission/reception system, a contents data transmitter, a contents data receiver, and a contents data transmission/reception method, in which it is difficult to extract encryption breaking information for decrypting encrypted contents data transmitted and received between plural apparatuses and easily decrypt the encrypted contents data.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view showing an embodiment of a contents data transmission/reception system of the invention;
DESCRIPTION OF PREFERRED EMBODIMENTS This invention is described in preferred embodiments in the following description with reference to the Figures, in which like numbers represent the same or similar elements. While this invention is described in terms of the best mode for achieving this invention's objectives, it will be appreciated by those skilled in the art that variations may be accomplished in view of these teachings without deviating from the spirit or scope of the invention.
In the case where the receiver ID information transmitted from the contents data transmitter 20 is coincident with the receiver ID information stored in the reception ID storage part 32 a, by the control of the receiver control part 36, the receiver ID authentication part 32 encrypts the receiver ID information and outputs it to the receiver transmission/reception part 31. In the case where the receiver ID information transmitted from the contents data transmitter 20 is not coincident with the receiver ID information stored in the reception ID storage part 32 a, the receiver ID authentication part 32 encrypts information (for example, data of �0�) indicating the inconsistency of the receiver ID information and outputs it to the receiver transmission/reception part 31.
The key information extraction part 33 extracts the encrypted key information from information stored in the key information transmission data received by the receiver transmission/reception part 31, and decrypts the encrypted key information to acquire the key information. The key information extraction part 33 notifies the receiver control part 36 whether or not the key information could be acquired. In the case where the key information could be acquired by the control of the receiver control part 36, the key information extraction part 33 encrypts data of, for example, �1� as information indicating that the key information could be extracted and outputs it to the receiver transmission/reception part 31. In the case where the key information could not be acquired, the key information extraction part 33 encrypts data of, for example, �0� as information indicating that the key information could not be acquired and outputs it to the receiver transmission/reception part 31.
In the case where both of these receiver ID information are not coincident with each other, the receiver control part 36 performs a control to encrypt information (for example, data of �0�) indicating the inconsistency of the receiver ID information, to store the encrypted data respectively into the equipment authentication response data composed of plural data rows, and to transmit the equipment authentication response data from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the key information extraction part 33 could acquire the key information, the receiver control part 36 performs a control to encrypt the information (for example, data of �1�) indicating that the key information could be acquired, to divide the encrypted data, to store the divided data into the key information reception data composed of plural data rows, and to transmit the key information reception data from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the key information extraction part 33 could not acquire the key information, the receiver control part 36 performs a control to encrypt information (for example, data of �0�) indicating that the key information could not be acquired, to divide the encrypted data, to store the divided data into the key information reception data composed of plural data rows, and to transmit the key information reception data from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the contents decryption part 34 could receive and decrypt the encrypted contents data, the receiver control part 36 performs a control to encrypt information (for example, data of �1�) indicating that the encrypted contents data could be received and decrypted, to divide the encrypted data, to store the divided data into the contents reception data composed of plural data rows, and to transmit the contents reception data from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the contents decryption part 34 could not receive or could not decrypt the encrypted contents data, the receiver control part 36 performs a control to encrypt information (for example, data of �0�) indicating that the encrypted contents data could not be received or could not be encrypted, to divide the encrypted data, to store the divided data into the contents reception data composed of plural data rows, and to transmit the contents reception data from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the receiver ID information transmitted by the contents data transmitter 20 is not coincident with the receiver ID information assigned to the contents data receiver 30, the information relating to whether or not both of receiver ID information are coincident with each other in the contents data receiver 30 is data of all �0�, and the data of �0� is stored in the first data area of the first data row to the sixth data area of the sixth data row.
In this embodiment, in the case where the receiver ID information transmitted by the contents data transmitter 20 is coincident with the receiver ID information assigned to the contents data receiver 30, the information relating to whether or not both of receiver ID information are coincident with each other in the contents data receiver 30 is the encrypted receiver ID information, however, other information (for example, data of all �1�) may be adopted. Besides, in this embodiment, in the case where the receiver ID information transmitted by the contents data transmitter 20 is not coincident with the receiver ID information assigned to the contents data receiver 30, the information relating to whether or not both of receiver ID information are coincident with each other in the contents data receiver 30 is made the data of all �0�, however, other information (for example, data of �101010 . . . �) may be adopted.
The information indicating whether or not the key information is acquired is, for example, data of all �1� in the case where the contents data receiver 30 acquired the key information, and data of all �0� in the case where the contents data receiver 30 could not acquire the key information.
In the case where the key information transmitted by the contents data transmitter 20 could be acquired, the contents data receiver 30 stores data of �1� into all bits of the first data area of the first data row to the sixth data area of the sixth data row, and sequentially transmits the first data row to the sixth data row to the contents data transmitter 20 through the response line.
In the case where the key information transmitted by the contents data transmitter 20 could not be acquired, the contents data receiver 30 stores data of �0� into all bits of the first data area of the first data row to the sixth data area of the sixth data row, and sequentially transmits the first data row to the sixth data row to the contents data transmitter 20 through the response line.
In this embodiment, the information relating to the acquisition of the key information is made the data of all �1� in the case where the contents data receiver 30 acquired the key information, and is made the data of all �0� in the case where the contents data receiver 30 could not acquire the key information, however, the invention is not limited thereto. Data of another pattern may be adopted as long as the case where the key information could be acquired can be discriminated from the case where the key information could not be acquired. For example, in the case where the contents data receiver 30 acquired the key information, bits of the half of each data area of the first data area of the first data row to the sixth data area of the sixth data row are made data of �1�, and bits of the remaining half are made data of �0�.
The information indicating whether or not the encrypted contents data could be received is, for example, data of all �1� in the case where the contents data receiver 30 received the encrypted contents data, and data of all �0� in the case where the contents data receiver 30 could not receive the encrypted contents data.
In the case where the contents data receiver 30 could receive encrypted contents data transmitted by the contents data transmitter 20 could be receive, the contents data receiver 30 stores the data of �1� into all bits of the first data area of the first data row to the sixth data area of the sixth data row, and sequentially transmits the first data row to the sixth data row to the contents data transmitter 20 through the response line.
In the case where the contents data receiver 30 could not receive the encrypted contents data transmitted by the contents data transmitter 20, the contents data receiver 30 stores the data of �0� into all bits of the first data area of the first data row to the sixth data area of the sixth data row, and sequentially transmits the first data row to the sixth data row to the contents data transmitter 20 through the response line.
In this embodiment, the information relating to the acquisition of the key information is made the data of all �1� in the case where the contents data receiver 30 received the encrypted contents data, and the data of all �0� in the case where the contents data receiver 30 could not receive the encrypted contents data, however, the invention is not limited thereto. Data of another pattern may be adopted as long as the case where the encrypted contents data could be received can be discriminated from the case where the encrypted contents data could not be received. For example, in the case where the contents data receiver 30 received the encrypted contents data, bits of the half of each data area of the first data area of the first data row to the sixth data area of the sixth data row are made data of �1�, and bits of the remaining half are made data of �0�.
In the case where the receiver ID information extracted from the equipment authentication data is coincident with the receiver ID information stored in the reception ID storage part 32 a, the contents data receiver 30 encrypts information (for example, data of all �0�) indicating that both of reception ID information are not coincident with each other, divides the encrypted data, stores it into the equipment authentication response data shown in FIG. 3B, and transmits it from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the key information could be acquired from the key information transmission data, the contents data receiver 30 encrypts information (for example, data of all �1�) indicating that the key information was acquired, divides the encrypted data, stores it into the key information reception data shown in FIG. 4B, and transmits it from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the key information could not be acquired from the key information transmission data, the contents data receiver 30 encrypts information (for example, data of all �0�) indicating that the key information could not be acquired, divides the encrypted data, stores it into the key information reception data shown in FIG. 4B, and transmits it from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the key information could not be acquired in the contents data receiver 30, the contents data receiver 30 encrypts information (for example, data of all �0�) indicating that the contents data could not be acquired, divides the encrypted data, stores it into the contents reception data shown in FIG. 5B, and transmits it from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the receiver ID information extracted from the equipment authentication data is not coincident with the receiver ID information stored in the reception ID storage part 32 a, the contents data receiver 30 encrypts information (for example, data of all �0�) indicating that both of these reception ID information are not coincident with each other, divides the encrypted data, stores it into the equipment authentication response data shown in FIG. 3B, and transmits it from the receiver transmission/reception part 31 through the response line to the contents data transmitter 20.
In the case where the contents data receiver 30 could not acquire the contents data transmitted by the contents data transmitter 20, the contents data receiver 30 encrypts information (for example, data of all �0�) indicating that the contents data could not be acquired, divides the encrypted data, stores it into the contents reception data shown in FIG. 5B, and transmits it from the receiver transmission/reception part 31 through the response line through the first data line to the sixth data line to the contents data transmitter 20.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6697945 *Apr 14, 1998Feb 24, 2004Sony CorporationInformation processing apparatus, information processing method, information processing system and recording mediumUS20020083319 *Apr 14, 1998Jun 27, 2002Ryuji IshiguroInformation processing apparatus, information processing method, information processing system and recording mediumEP0682425A2May 3, 1995Nov 15, 1995AT&amp;T Corp.A signaling protocol for a noisy communications channelEP0874300A2Apr 20, 1998Oct 28, 1998Sony CorporationInformation transmission, reception and recordingEP0977107A2Jul 12, 1999Feb 2, 2000Victor Company of Japan, Ltd.Method and system for processing information on encryption basisEP1089488A1Apr 11, 2000Apr 4, 2001Sony CorporationInformation processing system, information processing method, and information processing deviceEP1161040A2May 8, 2001Dec 5, 2001Mitsubishi Heavy Industries, Ltd.Data transmission over a plurality of lines* Cited by examinerNon-Patent CitationsReference1Hitachi, Ltd. Et al., "5C Digital Transmission Content Protection White Paper-Revision 1.0", DTCP Group, Jul. 14, 1998, XP002134182.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8752138 *Dec 2, 2011Jun 10, 2014Google Inc.Securing user contact information in collaboration sessionUS20120311318 *May 8, 2012Dec 6, 2012Sony CorporationInformation processing system, information processing device, information processing method and programUS20130142330 *Dec 2, 2011Jun 6, 2013Adobe Systems IncorporatedBinding of protected video content to video player with block cipher hashUS20130142331 *Dec 2, 2011Jun 6, 2013Adobe Systems IncorporatedBinding of protected video content to video player with encryption key* Cited by examinerClassifications U.S. Classification380/277, G9B/20.002, 713/189, 713/193, 348/E07.056International ClassificationH04L9/00, G06F21/00, H04N7/167, G11B20/00, H04L29/06Cooperative ClassificationH04L63/08, H04N7/1675, H04N21/4367, G06F21/606, G11B20/00173, H04L2463/101, G11B20/00086, G06F21/10, H04L63/065, G11B20/0021, H04L63/0428, G11B20/00224European ClassificationH04N21/4367, G06F21/60C, G06F21/10, H04L63/08, H04L63/04B, G11B20/00P5A2, H04L63/06C, G11B20/00P5, G11B20/00P3B, G11B20/00PLegal EventsDateCodeEventDescriptionSep 14, 2011FPAYFee paymentYear of fee payment: 4Jul 16, 2010ASAssignmentEffective date: 20090313Owner name: MIZUHO CORPORATE BANK, LTD., LONDON BRANCH AS OFFSFree format text: SECURITY AGREEMENT;ASSIGNOR:D&M HOLDINGS INC.;REEL/FRAME:24697/243Free format text: SECURITY AGREEMENT;ASSIGNOR:D&M HOLDINGS INC.;REEL/FRAME:024697/0243Nov 1, 2006ASAssignmentOwner name: D&M HOLDINGS INC., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DENON LTD.;REEL/FRAME:018495/0672Effective date: 20050401Sep 14, 2006ASAssignmentOwner name: D & M HOLDINGS INC., JAPANFree format text: CHANGE OF NAME;ASSIGNOR:DENON LTD.;REEL/FRAME:018308/0017Effective date: 20050401Mar 16, 2004ASAssignmentOwner name: DENON, LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUKUDA, KEIICHI;REEL/FRAME:015107/0720Effective date: 20040219RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services