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    71.
    发明专利
    未知

    公开(公告)号：DE69833608T2

    公开(公告)日：2007-02-15

    申请号：DE69833608

    申请日：1998-04-20

    Applicant: SONY CORP

    Inventor： ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  OSAKABE YOSHIO ,  SATO MAKOTO

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

    Abstract: An information processing apparatus and an information processing method are capable of preventing information from being copied illegally. A hash function and a service key are stored in advance in an EEPROM of a DVD player serving as a source. In an EEPROM of a personal computer (PC) serving as a sink, its ID and a license key are stored beforehand. The DVD player requests the PC to transmit the ID. The DVD player then applies the hash function to data resulting from concatenation of the ID with the service key to generate a license key (= hash (ID PARALLEL service_key)). Subsequently, the DVD player generates a source side common session key and encrypts the session key by using the generated license key. Then, the DVD player transmits the encrypted source side common session key to the PC. The PC decrypts the encrypted source side common session key by using the license key stored in its EEPROM to produce a sink side common session key which has a value equal to that of the source side common session key.

    73.
    发明专利
    未知

    公开(公告)号：DE69635069T2

    公开(公告)日：2006-06-01

    申请号：DE69635069

    申请日：1996-06-25

    Applicant: SONY CORP

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

    IPC: G11B20/00 ,  G06F1/00 ,  G06F21/10 ,  G06F21/62 ,  G06Q20/38 ,  G11B7/00 ,  G11B7/004 ,  G11B20/10 ,  H04L9/08

    Abstract: A data recording apparatus is capable of easily preventing copying of information in that, even if information is copied, the copied information cannot be reproduced. The data recording apparatus has a terminal (2) to which encoder identification information ("ID") specific to the data recording apparatus is input, a recording unit (5) for recording at least the encoder ID on an optical disk (D), and an encoding circuit (3) for encoding, in accordance with the encoder ID, data supplied via a terminal (1) and required to be recorded so that encoded data is, together with the encoder ID, recorded on the optical disk (D).

    74.
    发明专利
    未知

    公开(公告)号：DE69634017T2

    公开(公告)日：2005-11-03

    申请号：DE69634017

    申请日：1996-08-16

    Applicant: SONY CORP

    Inventor： SAKO YOICHIRO ,  KAWASHIMA ISAO ,  OSAWA YOSHITOMO ,  KURIHARA AKIRA ,  MASUDA SHOZO

    IPC: G06F1/00 ,  G11B7/007 ,  G11B20/00 ,  G11B27/30 ,  G11B27/32 ,  H04N5/85 ,  H04N5/913 ,  H04N9/79 ,  H04N9/804 ,  H04N21/2389 ,  H04N21/8358 ,  H04B1/66

    Abstract: A signal recording/reproducing method and apparatus, a signal record medium, and a signal transmission/reception method and apparatus enable a signal recorded on a signal record medium to be identified as being an original signal or a copied signal. A CPU (11) generates, at a pre-set time interval, an identification signal having a meaning at a pre-set time interval, and an identification signal addition circuit (3) adds the identification signal to video signals and/or audio signals. A sector forming circuit (5) and circuit components up to a recording/reproducing head (14) record the video signals and/or the audio signals and the ancillary identification signal on an optical disc (12).

    Information processing system and method
    75.
    发明专利
    Information processing system and method 未知

    公开(公告)号：AU780325B2

    公开(公告)日：2005-03-17

    申请号：AU4470901

    申请日：2001-04-02

    Applicant: SONY CORP

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

    IPC: G06F12/14 ,  G06F1/00 ,  G06F21/10 ,  G06F21/62 ,  G11B20/00 ,  H04L9/08 ,  H04L9/00 ,  G06F17/60 ,  G11B20/10 ,  G11B20/12

    Abstract: A content key, an authentication key, and a program data etc. are transmitted with an enabling key block (EKB) in an encrypted key constitution of a tree structure. The EKB has a constitution in which a device as a leaf of the tree holds a leaf key and a limited node key, and a specific enabling key block (EKB) is generated and distributed to a group specified by a specific node to limit devices that can be renewed. As the devices that do not belong to the group cannot perform decryption, the security for distributing keys etc. can be secured. Thus, distribution of various kinds of keys or data is executed in an encryption key constitution of a tree structure to realize an information processing system and method enabling to distribute data efficiently and safely.

    INFORMATION PROCESSING DEVICE AND PROCESSING METHOD
    77.
    发明专利
    INFORMATION PROCESSING DEVICE AND PROCESSING METHOD 未知

    公开(公告)号：HK1053916A1

    公开(公告)日：2003-11-07

    申请号：HK03104432

    申请日：2003-06-19

    Applicant: SONY CORP

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

    IPC: G06F21/10 ,  G10K20060101 ,  G11B20060101 ,  G11B20/00 ,  H04L20060101 ,  H04L9/08 ,  H04L29/06

    Abstract: An information recording/reproducing device for executing a key distribution by a KRB distribution involving a tree-structure key distribution configuration. The device transmits, by using a key-structure key distribution configuration, a key such as a master key, a media key or a content key along with a key update block (KRB). The recording/reproducing device, after calculating and acquiring the key of a certain recording medium based on a reception KRB, encrypts the acquired key using an encryption key specific to the device, for example, a leaf key, and stores it in a recording medium or memory of the device. Therefore, the recording/reproducing device can calculate a key by merely decoding the encrypting key one time when next using the recording medium or contents, and can reduce computational complexity such as KRB decoding required when the device accesses a recording medium or uses contents, thereby making efficient processing on the KRB receiving side.

    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK
    78.
    发明专利
    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK 未知

    公开(公告)号：HK1053556A1

    公开(公告)日：2003-10-24

    申请号：HK03104427

    申请日：2003-06-19

    Applicant: SONY CORP

    Inventor： KITAYA YOSHIMICHI ,  ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  ASANO TOMOYUKI

    IPC: G11B20/00 ,  H04L20090101 ,  H04L9/08

    Abstract: An information processing system and method using an encryption key block sets sub-trees classified based on data processing ability of the devices (capability) in a key tree in which respective keys are corresponded to a root, nodes and leaves of a tree in which a plurality of devices are constituted as the leaves, generates a sub-enabling key block which is effective for an entity in a managing subject of each sub-tree (entity), and generates an enabling key block decodable only by the entities having common capability. Also, an information processing system and method using an encryption key block manages a partial tree of a key tree (sub-tree), generates a sub-enabling key block based only on a key set corresponding to nodes or leaves included in the sub-tree, and generates an enabling key block decodable only by selected entities by using the sub-enabling key block. Thus, it is possible to generate and distribute an enabling key block corresponding to data processing ability of a device and to manage devices by dividing a hierarchical key tree structure.

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