公开(公告)号：DE60127096D1

公开(公告)日：2007-04-19

申请号：DE60127096

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  H04L9/00 ,  G06F21/00 ,  G06F21/10 ,  G06F21/62 ,  G06Q30/06 ,  G06Q50/00 ,  G06Q50/10 ,  G10K15/02 ,  G11B20/00 ,  G11B20/10 ,  H04L9/08 ,  H04L29/06 ,  H04N7/167

Abstract: An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is produced so as to include a plurality of subtrees that are grouped in accordance with categories and managed by category entities. An EKB is produced so as to include data produced by selecting a path in the key tree and encrypting an upper-level key in the selected path using a lower-level key in the selected path, and the resultant EKB is provided to a device. If a change occurs in state of a category tree capable of processing an EKB identified in the EKB type definition list, a notification of the change in state is sent to an entity that uses the EKB thereby making it possible for an EKB requester to perform processing in accordance with a newest EKB.

公开(公告)号：DE60126540D1

公开(公告)日：2007-03-29

申请号：DE60126540

申请日：2001-04-04

Applicant: SONY CORP

Inventor： ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ASANO TOMOYUKI ,  MITSUZAWA ATSUSHI

IPC: H04L9/08 ,  G06F1/00 ,  G06F21/00 ,  G11B20/00 ,  H04L9/32 ,  H04N7/16

Abstract: The enabling key block (EKB) used in an encrypted key distributing constitution of a tree structure is generated by reconstructing a simplified 2-branch or multi-branch type tree with a terminal node or leaf which can decrypt as the lowest stage, and on the basis of only the key corresponding to a node or a leaf of the reconstructed hierarchical tree. Further, a tag as discrimination data at a tree position of an encrypted key stored in EKB is stored. The tag not only discriminates a position but stores data for judging presence of encrypted key data.within EKB. A considerable reduction in data quantity is realized, and decrypting process, in a device is also simplified. Thus, an information processing system and method capable of reducing data quantity of an enabling key block (EKB) used in an encrypted key constitution of a tree structure is realized.

公开(公告)号：DE69636842D1

公开(公告)日：2007-02-22

申请号：DE69636842

申请日：1996-06-18

Applicant: SONY CORP

Inventor： SAKO YOICHIRO ,  KAWASHIMA ISAO ,  KURIHARA AKIRA ,  OSAWA YOSHITOMO ,  OWA HIDEO

IPC: G06F12/00 ,  G06F12/14 ,  G06F1/00 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/10 ,  G11B27/30 ,  G11B27/32 ,  H04N5/85 ,  H04N5/913

Abstract: An input is ciphered in at least one of a sector forming circuit 13, a scrambling circuit 14, a header appendage circuit 15, an error correction encoding circuit 16, a modulation circuit 18 and a synchronization appendage circuit 18, used for processing input data for forming a recording signal. Not only the key for ciphering itself in the circuits but also the information as to which of the circuits has been used for ciphering becomes the key for ciphering. This realizes ciphering difficult to decode by a simplified structure.

公开(公告)号：MY128076A

公开(公告)日：2007-01-31

申请号：MYPI9801757

申请日：1998-04-21

Applicant: SONY CORP

Inventor： ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  OSAKABE YOSHIO ,  SATO MAKOTO ,  ASANO TOMOYUKI ,  SHIMA HISATO

IPC: G06F11/00 ,  G06F12/14 ,  G06F1/00 ,  G06F21/00 ,  G06F21/24 ,  G11B19/04 ,  G11B19/12 ,  G11B20/00 ,  H04L9/08 ,  H04L9/10 ,  H04L9/32 ,  H04L12/40 ,  H04L12/64

Abstract: A HASH FUNCTION AND A SERVICE KEY ARE STORED IN ADVANCE IN AN EEPROM (50) OF A DVD PLAYER (1) SERVING AS A SOURCE. IN AN EEPROM (50) OF A PERSONAL COMPUTER (PC) SERVING AS A SINK. ON THE OTHER HAND, ITS ID AND A LICENSE KEY ARE STORED BEFOREHAND. THE DVD PLAYER (1) REQUESTS THE PC TO TRANSMIT THE ID. THE DVD PLAYER (1) THEN APPLIES THE HASH FUNCTION TO DATA RESULTING FROM CONCATENATION OF THE ID WITH THE SERVICE KEY TO GENERATE A LICENSE KEY (= HASH (ID I SERVICE 13 KEY)). SUBSEQUENTLY, THE DVD PLAYER (1) GENERATES A SOURCE SIDE SESSION KEY ARID ENCRYPTS THE SESSION KEY BY USING THE GENERATED LICENSE KEY. THEN, IHE DVD PLAYER (1) TRANSMITS THE ENCRYPTED SOURCE SIDE SESSION KEY TO THE PC (2). THE PC DECRYPTS THE ENCRYPTED SOURCE SIDE SESSION KEY BY USING THE LICENSE KEY STORED IN ITS EEPROM (50) TO PRODUCE A SINK SIDE SESSION KEY WHICH HAS A VALUE EQUAL TO THAT OF THE SOURCE SIDE SESSION KEY.(FIG 1)

公开(公告)号：MY122244A

公开(公告)日：2006-04-29

申请号：MYPI9801762

申请日：1998-04-21

Applicant: SONY CORP

Inventor： ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  OSAKABE YOSHIO ,  SATO MAKOTO ,  SHIMA HISATO ,  ASANO TOMOYUKI

IPC: H04L9/08 ,  H04N7/167 ,  G06F1/00 ,  G06F21/00 ,  G09C1/00 ,  G11B20/00

Abstract: THE INVENTION PROVIDES AN ENCIPHERING APPARATUS AND METHOD, A DECIPHERING APPARATUS AND METHOD AND AN INFORMATION PROCESSING APPARATUS AND METHOD BY WHICH ILLEGAL COPING CAN BE PREVENTED WITH CERTAINTY. DATA ENCIPHERED BY A 1394 INTERFACE (26) OF A DVD PLAYER (1) IS TRANSMITTED TO A PERSONAL COMPUTER (2) AND A MAGNETO-OPTICAL DISK APPARATUS (3) THROUGH A 1394 BUS (11). IN THE MAGNETO-OPTICAL DISK APPARATUS (3) WITH WHICH A CHANGE TO A FUNCTION IS NOT OPEN TO A USER, THE RECEIVED DATA IS DECIPHERED BY A 1394 INTERFACE (36). IN CONTRAST, IN THE PERSONAL COMPUTER (2) WITH WHICH A CHANGE TO A FUNCTION IS OPEN TO A USER, THE ENCIPHERED DATA IS DECIPHERED USING A TIME VARIABLE KEY (50) BY A 1394 INTERFACE (49), AND A RESULT OF THE DECIPHERMENT IS FURTHER DECIPHERED USING A SESSION KEY BY AN APPLICATION SECTION.

公开(公告)号：DE69832321D1

公开(公告)日：2005-12-22

申请号：DE69832321

申请日：1998-04-20

Applicant: SONY CORP

Inventor： OSAKABE YOSHIO ,  SATO MAKOTO ,  OSAWA YOSHITOMO ,  ASANO TOMOYUKI ,  ISHIGURO RYUJI ,  SHIMA HISATO

IPC: G11B20/10 ,  G06F21/10 ,  G06F21/62 ,  H04L9/08 ,  H04L9/14 ,  H04L9/16 ,  H04L12/28 ,  H04L12/40 ,  H04L12/64 ,  H04L47/43 ,  H04N7/24 ,  H04N21/436 ,  H04N21/4363 ,  H04N21/4367 ,  H04L29/06 ,  G11B20/00

Abstract: Data to be transmitted via a serial bus (5) in conformity with the IEEE 1394 protocol are ciphered by a ciphering/deciphering circuit (24), and headers are attached thereto by a header sync detecting/generating circuit (23). After further attachment of a CRC code by a CRC detector/generator (33), the data are packetized into isochronous packets of an isochronous mode by a transmission/reception switching circuit (21), whereby transmission of the data can be performed with enhanced security. Out of the cipher keys employed, a session key invariable in each session of the data is transmitted in each packet of an asynchronous mode, and a time variable key updated in each session is transmitted in each packet of an isochronous mode. The ciphered data obtained by depacketizing the packets of the isochronous mode are deciphered, so that the data transmitted with security can be deciphered exactly, and thus illegal use of the data can be prevented.

公开(公告)号：HK1062366A1

公开(公告)日：2004-10-29

申请号：HK04103748

申请日：2004-05-25

Applicant: SONY CORP

Inventor： TAKI RYUTA ,  ASANO TOMOYUKI ,  OISHI TATEO ,  OSAWA YOSHITOMO

IPC: G06F12/14 ,  G06F20090101 ,  G06F21/00 ,  G06F21/24 ,  G09C1/00 ,  G11B20090101 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  H04L20090101 ,  H04L9/08 ,  H04L9/32

Abstract: A system and method are realized which enables valid use of content by preventing unauthorized use of content which is caused by rewriting rights data. A structure is employed in which rights data including use-restriction information on content and DRM data including an encrypted content key are recorded in a digital data recording medium (media), and in which an integrity check value (ICV) for the DRM data can be stored in a recordable/playable area (protected area) by using only a dedicated IC. EKB distribution is used to execute the tree-structure key distribution to distribute keys for generating ICV-generation verifying keys. In this structure, unauthorized use of content by rewriting of the rights data is prevented.

公开(公告)号：HK1058588A1

公开(公告)日：2004-05-21

申请号：HK03109356

申请日：2003-12-23

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  G06F12/00 ,  G06F21/62 ,  G11B20/00 ,  H04L9/00 ,  H04L9/08 ,  H04N7/167 ,  H04L ,  G06F

Abstract: An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is formed so as to include a plurality of subtrees serving as category trees categorized in accordance with categories and managed by category entities. An EKB including data produced by selecting a path in a tree and encrypting a higher-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. Distribution of EKB's is managed on the basis of an EKB type definition list representing the correspondence between an EKB type identifier and one or more identification data identifying one or more category trees that can process an EKB of an EKB type specified by the EKB type identifier.

公开(公告)号：HK1053557A1

公开(公告)日：2003-10-24

申请号：HK03104433

申请日：2003-06-19

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  ISHIGURO RYUJI ,  MITSUZAWA ATSUSHI ,  OISHI TATEO

IPC: H04L20090101 ,  G06F21/10 ,  G10K20090101 ,  G11B20090101 ,  G11B20/00 ,  G11B20/10 ,  H04L9/08

Abstract: An information reproducing method and an information reproducing device in which the key renewal block (KRB) of the latest verison is selectively used to encrypt the content to store the encrypted contents in a recording medium. A plural num er of KRBs of different generations and versions are stored in a recording medium. If the latest KRB is detected, it is stored in a memory unit within the recording and/or reproducing device. A plural number of KRBs having plural different generations or versions are stored on the recording medium. With the present method and device, in storing the content in the recording medium, the latest usable one of the KRB in the memory unit of the reproducing device and plural KRBs on the recording medium is detected to acquire an encrypting key, such as a media key, to execute the content encryption. In this manner, the encrypted content based on a KRB of a newer version can at all times be stored on the recording medium.

公开(公告)号：HK1051269A1

公开(公告)日：2003-07-25

申请号：HK03102224

申请日：2003-03-27

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  KATO MOTOKI

IPC: H04N5/91 ,  G06F12/14 ,  G06F21/10 ,  G06F21/62 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  H04L9/16 ,  H04N5/92 ,  H04L ,  G11B

Abstract: A block key to encrypt block data is generated using an ATS (arrival time stamp) appended to each of TS (transport stream) packets included in a transport stream correspondingly to the arrival time of the TS packet. The ATS is a random data depending upon an arrival time, and so a block-unique key can be generated, which enhances the protection against data cryptanalysis. A block key is generated from a combination of an ATS with a key unique to a device, recording medium or the like such as a master key, disc-unique key, title-unique key or the like. Since an ATS is used to generate a block key, any area for storage of an encryption key for each block may not be provided in a recording medium.