公开(公告)号：EP1139660A9

公开(公告)日：2002-03-20

申请号：EP98955969

申请日：1998-11-25

Applicant: IBM

Inventor： KAMIJO KOICHI ,  SHIMIZU SHUICHI ,  MORIMOTO NORISHIGE

IPC: G06T1/00 ,  H04N7/24 ,  H04N7/26 ,  H04N7/08 ,  G09C5/00

CPC classification number: G06T1/0035 ,  G06T2201/0052 ,  G06T2201/0053 ,  H04N7/24 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/8358

Abstract: An intra-block of the I-frame or P,B-frame is detected from an MPEG stream. When it is detected, one macro block of data is taken out from the MPEG stream and buffered. The buffered macro block is embedded with a pattern so that the length of the VLC may be invariant. The macro block embedded with a pattern is returned back to the MPEG stream. More specifically, the DC component is detected from the buffered macro block and a pseudo-random number is generated in order to generate a pattern to be embedded. It is judged whether or not the bit length of the DC component is invariant when the generated pattern is embedded. If the bit length is invariant, the pattern is embedded in the buffered macro block. When the bit length is varied, it is judged whether or not half of the pattern can be embedded. If possible, the pattern is embedded.

公开(公告)号：EP1139660A4

公开(公告)日：2003-02-26

申请号：EP98955969

申请日：1998-11-25

Applicant: IBM

Inventor： KAMIJO KOICHI ,  SHIMIZU SHUICHI ,  MORIMOTO NORISHIGE

IPC: G06T1/00 ,  H04N7/24 ,  H04N7/26

CPC classification number: G06T1/0035 ,  G06T2201/0052 ,  G06T2201/0053 ,  H04N7/24 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/8358

Abstract: An intra-block of the I-frame or P,B-frame is detected from an MPEG stream. When it is detected, one macro block of data is taken out from the MPEG stream and buffered. The buffered macro block is embedded with a pattern so that the length of the VLC may be invariant. The macro block embedded with a pattern is returned back to the MPEG stream. More specifically, the DC component is detected from the buffered macro block and a pseudo-random number is generated in order to generate a pattern to be embedded. It is judged whether or not the bit length of the DC component is invariant when the generated pattern is embedded. If the bit length is invariant, the pattern is embedded in the buffered macro block. When the bit length is varied, it is judged whether or not half of the pattern can be embedded. If possible, the pattern is embedded.

公开(公告)号：CZ2001721A3

公开(公告)日：2002-05-15

申请号：CZ2001721

申请日：1998-11-25

Applicant: IBM

Inventor： KAMIJO KOICHI ,  SHIMIZU SHUICHI ,  MORIMOTO NORISHIGE

IPC: G06T1/00 ,  H04N7/24 ,  H04N7/26 ,  H04N7/08 ,  G09C5/00

Abstract: It is one object of the present invention to provide a method and system for embedding an electronic watermark directly in an MPEG stream. ÄConstitutionÜ An intra-macroblock of an I-frame or of a P or B-frame is detected in an MPEG stream, and following the detection of an intra-macroblock of the I-frame or of the P or B-frame, data for one macroblock are extracted from the MPEG stream and buffered. An embedding pattern is embedded in the buffered macroblock without changing the length of VLC, and the resultant macroblock is returned to the MPEG stream. More specifically, a DC factor is extracted from the buffered macroblock, and a pseudorandom number is generated to produce an embedding pattern. Then, whether the bit length of the DC factor will not be changed by embedding the obtained embedded pattern is determined. When the bit length of the DC factor not be changed, the embedding pattern is embedded in the buffered macroblock. When the bit length will be changed, whether 1/2 of the embedding pattern can be embedded is determined. If possible, 1/2 of the embedded pattern is embedded in the macroblock.

公开(公告)号：CZ20010721A3

公开(公告)日：2002-05-15

申请号：CZ20010721

申请日：1998-11-25

Applicant: IBM

Inventor： KAMIJO KOICHI ,  SHIMIZU SHUICHI ,  MORIMOTO NORISHIGE

IPC: G06T1/00 ,  H04N7/24 ,  H04N7/26 ,  H04N7/08 ,  G09C5/00

CPC classification number: G06T1/0035 ,  G06T2201/0052 ,  G06T2201/0053 ,  H04N7/24 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/8358

公开(公告)号：PL346276A1

公开(公告)日：2002-01-28

申请号：PL34627698

申请日：1998-11-25

Applicant: IBM

Inventor： KAMIJO KOICHI ,  SHIMIZU SHUICHI ,  MORIMOTO NORISHIGE

IPC: G06T1/00 ,  H04N7/24 ,  H04N7/26 ,  H04N7/08

Abstract: It is one object of the present invention to provide a method and system for embedding an electronic watermark directly in an MPEG stream. ÄConstitutionÜ An intra-macroblock of an I-frame or of a P or B-frame is detected in an MPEG stream, and following the detection of an intra-macroblock of the I-frame or of the P or B-frame, data for one macroblock are extracted from the MPEG stream and buffered. An embedding pattern is embedded in the buffered macroblock without changing the length of VLC, and the resultant macroblock is returned to the MPEG stream. More specifically, a DC factor is extracted from the buffered macroblock, and a pseudorandom number is generated to produce an embedding pattern. Then, whether the bit length of the DC factor will not be changed by embedding the obtained embedded pattern is determined. When the bit length of the DC factor not be changed, the embedding pattern is embedded in the buffered macroblock. When the bit length will be changed, whether 1/2 of the embedding pattern can be embedded is determined. If possible, 1/2 of the embedded pattern is embedded in the macroblock.

公开(公告)号：HU0105014A2

公开(公告)日：2002-04-29

申请号：HU0105014

申请日：1998-11-25

Applicant: IBM

Inventor： KAMIJO KOICHI ,  MORIMOTO NORISHIGE ,  SHIMIZU SHUICHI

IPC: G06T1/00 ,  H04N7/24 ,  H04N7/26 ,  H04N7/08

Abstract: It is one object of the present invention to provide a method and system for embedding an electronic watermark directly in an MPEG stream. ÄConstitutionÜ An intra-macroblock of an I-frame or of a P or B-frame is detected in an MPEG stream, and following the detection of an intra-macroblock of the I-frame or of the P or B-frame, data for one macroblock are extracted from the MPEG stream and buffered. An embedding pattern is embedded in the buffered macroblock without changing the length of VLC, and the resultant macroblock is returned to the MPEG stream. More specifically, a DC factor is extracted from the buffered macroblock, and a pseudorandom number is generated to produce an embedding pattern. Then, whether the bit length of the DC factor will not be changed by embedding the obtained embedded pattern is determined. When the bit length of the DC factor not be changed, the embedding pattern is embedded in the buffered macroblock. When the bit length will be changed, whether 1/2 of the embedding pattern can be embedded is determined. If possible, 1/2 of the embedded pattern is embedded in the macroblock.

公开(公告)号：JP2013041439A

公开(公告)日：2013-02-28

申请号：JP2011178231

申请日：2011-08-17

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Machines Corporation

Inventor： NAKAMURA HIROAKI ,  MIYASHITA TAKASHI ,  KAMIJO KOICHI

IPC: G06F21/62 ,  H04L9/08

CPC classification number: H04L9/0836 ,  G06F21/6209

Abstract: PROBLEM TO BE SOLVED: To properly provide a view in accordance with access permission when data is linked between domains.SOLUTION: A domain data owner groups the same recipients in accordance with the hierarchy of data, encrypts a group of leaves using a common key, and replaces the encrypted group with an element of a name. The common key of all the groups is encrypted using a public key of the recipients to make public data M. A link creator decrypts each group using the common key, generates a table for each group on the basis of a link, and propagates each record of the table to a parent. The table is encrypted using the common key, and the entire data obtained is encrypted using the common key. The common key is encrypted using the public key of the recipients of the link to make public data N. A referrer obtains the common key by decrypting the data N and the data M using a secret key, to decrypt domain data and link data. Here, each record of the table is propagated to a child, and those having the same link names are replaced by the records of the child.

Abstract translation: 要解决的问题：当数据在域之间链接时，根据访问权限正确提供视图。 解决方案：域数据拥有者根据数据层次结构对相同的收件人进行分组，使用公用密钥加密一组树叶，并使用名称元素替换加密组。 所有组的公共密钥使用接收者的公共密钥进行加密，以制作公共数据M.链接创建者使用公共密钥对每个组进行解密，基于链接为每个组生成一个表，并传播每个记录 的表给父母。 使用公共密钥对表进行加密，使用公共密钥对获得的整个数据进行加密。 公共密钥使用链路的接收者的公开密钥进行加密，以使得公开数据N.引用者通过使用秘密密钥解密数据N和数据M来获得公共密钥，以解密域数据和链接数据。 在这里，表的每个记录被传播给一个小孩，而具有相同链接名称的那些记录被该孩子的记录所取代。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2008078952A

公开(公告)日：2008-04-03

申请号：JP2006255183

申请日：2006-09-21

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： KAMIJO KOICHI ,  SAKAMOTO MASAHARU

IPC: H04L9/08

CPC classification number: H04L9/0836 ,  H04L2209/601

Abstract: PROBLEM TO BE SOLVED: To transfer authority of encryption communication without increasing leakage risk of an encryption key. SOLUTION: A system with a first communication apparatus and a management apparatus which makes encryption communications perform between the first communication apparatus and an external second communication apparatus, is offered. The management apparatus is provided with: a key memory unit which memorizes a first encryption key which is shared with the second communication apparatus; a key creation unit which performs operation which gives the first encryption key which is read out from the key memory unit to one direction function with a key, and creates the operation result as the second encryption key; and a key output unit which outputs the second encryption key and the key of the one direction function to the first communication apparatus. The first communication apparatus is provided with a key creation control unit which transmits the key of the one direction function received from the management apparatus to the second communication apparatus, makes the second communication apparatus perform operation to give the memorized first encryption key to the one direction function with the key, and creates the second encryption key; and an encryption communication unit which performs encryption communications with the second communication apparatus using the second encryption key received from the management apparatus. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：传递加密通信的权限，而不增加加密密钥的泄漏风险。 提供一种具有在第一通信装置和外部第二通信装置之间进行加密通信的第一通信装置和管理装置的系统。 管理装置设置有：密钥存储单元，其存储与第二通信装置共享的第一加密密钥; 密钥创建单元，执行将从密钥存储器单元读出的第一加密密钥与密钥一个方向函数进行的操作，并创建作为第二加密密钥的操作结果; 以及键输出单元，其向第一通信设备输出第二加密密钥和单向功能的密钥。 第一通信装置设置有密钥创建控制单元，其将从管理装置接收的一个方向功能的密钥发送到第二通信装置，使第二通信装置执行操作以将存储的第一加密密钥提供给一个方向 使用键功能，并创建第二个加密密钥; 以及加密通信单元，其使用从所述管理装置接收的所述第二加密密钥来执行与所述第二通信装置的加密通信。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2006013790A

公开(公告)日：2006-01-12

申请号：JP2004186640

申请日：2004-06-24

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： KAMIJO KOICHI

IPC: H04L9/08

CPC classification number: H04L63/0442 ,  H04L9/0836 ,  H04L2209/601

Abstract: PROBLEM TO BE SOLVED: To reduce the message length of an encryption message selectively transmitted to a plurality of decoding apparatuses. SOLUTION: In an encryption communication system, an encryption apparatus includes a node-associated information generator for generating node-associated information for associating each end node in a tree structure with each decoding apparatus according to the group of the decoding apparatuses which permit decoding, a node extraction part for extracting a decoding permission node which has the decoding apparatus for allowing the decoding as the end node of a descendant and which does not have the decoding apparatus for inhibiting decoding even in any end node of the descendant, and a message encryption unit for encrypting the message by the node encryption key of the decoding permission node. Each decoding apparatus includes an end node specifier for specifying the end node associated with the decoding apparatus based on the node-associated information, and a message decoding unit for decoding the encryption message by the node decoding key of any decoding permission node from the end node to a route node. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：减少选择性地发送到多个解码装置的加密消息的消息长度。 解密：在加密通信系统中，加密装置包括：节点关联信息生成器，用于生成节点关联信息，用于根据允许的解码装置的组将树结构中的每个端节点与每个解码装置相关联 解码，用于提取解码许可节点的节点提取部分，其具有用于允许解码的解码装置作为后代的结束节点，并且即使在后代的任何结束节点中也不具有用于禁止解码的解码装置， 消息加密单元，用于通过解码许可节点的节点加密密钥加密消息。 每个解码装置包括用于基于节点相关信息指定与解码装置相关联的结束节点的端节点说明符，以及消息解码单元，用于通过来自端节点的任何解码许可节点的节点解码密钥来解密加密消息 到路由节点。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2007140578A

公开(公告)日：2007-06-07

申请号：JP2005329070

申请日：2005-11-14

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： SAKAMOTO MASAHARU ,  MIYAGAWA KIYOSHI ,  IWASAKI HIDEAKI ,  KAMIJO KOICHI ,  MISONO KAZUHISA

IPC: G06F21/24 ,  G06F13/00 ,  G06F21/60 ,  G06F21/62 ,  G06Q50/00 ,  G06Q50/10

CPC classification number: G06Q10/107

Abstract: PROBLEM TO BE SOLVED: To properly manage the content of information registered in a user community. SOLUTION: To provide a system for managing a user community provided on an information processing system for allowing the other users refer to information provided by a user. This system is provided with a storage part for storing an audit policy for specifying the content of information for permitting registration in the user community in association with each of a plurality of user communities; a detection part for detecting the user community of a provision destination according to the provision of information by the user; and a registration control part for preventing the information from being registered in the user community under such conditions that the information provided by the user is against the audit policy corresponding to the detected user community. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：正确管理在用户社区中注册的信息的内容。 解决方案：提供一种用于管理在信息处理系统上提供的用户社区的系统，以允许其他用户参考由用户提供的信息。 该系统设置有存储部件，用于存储用于指定与多个用户社区中的每一个相关联地在用户社区中注册的信息的内容的审计策略; 检测部，其根据用户的信息提供来检测提供目的地的用户群; 以及注册控制部分，用于在用户所提供的信息与所检测的用户社区相对应的审计策略的条件下，防止在用户社区中注册信息。 版权所有（C）2007，JPO＆INPIT