公开(公告)号：EP2157725A1

公开(公告)日：2010-02-24

申请号：EP09010404.3

申请日：2009-08-12

申请人： Hitachi Ltd.

发明人： Hatano, Yasuo ,  Miyazaki, Kunihiko

IPC分类号： H04L9/08 ,  H04L9/32

CPC分类号： H04L9/3247 ,  H04L9/088 ,  H04L2209/60

摘要： Content (120) is divided (401) into a of partial contents (500). Next, each of the partial contents (500) is encrypted (403) using a browsing-control-use secret key (508). Also, an editing-control-use secret key (506) and a partial-content validation key (507) are generated (402), then generating the feature value (505) for each of the partial content (500). Moreover, key-encrypted data (503) is generated (405) by encrypting the browsing-control-use secret key (508) and the editing-control-use secret key (506) corresponding to each of the browsable and editable partial contents, using the public key (511) of a user. Finally, encrypted content (121) is generated (407) from the key-encrypted data (503), encrypted partial contents (504), and the partial-content validation key (507).

摘要翻译： 内容（120）被分割（401）成部分内容（500）。 接下来，使用浏览控制用密钥（508）对每个部分内容（500）进行加密（403）。 此外，生成编辑控制使用秘密密钥（506）和部分内容验证密钥（507）（402），然后为每个部分内容（500）生成特征值（505）。 此外，通过加密与每个可浏览和可编辑的部分内容相对应的浏览控制使用秘密密钥（508）和编辑控制使用秘密密钥（506）来生成密钥加密数据（503）（405） 使用用户的公开密钥（511）。 最后，从密钥加密数据（503），加密部分内容（504）和部分内容验证密钥（507）生成加密内容（407）（407）。

公开(公告)号：EP1349084A3

公开(公告)日：2005-12-21

申请号：EP02253741.9

申请日：2002-05-28

申请人： Hitachi, Ltd.

发明人： Miyazaki, Kunihiko ,  Itoh, Shinji ,  Omoto, Narihiro ,  Bessho, Yoshiharu

IPC分类号： G06F17/30

CPC分类号： G06F17/30067

摘要： A reliably safe storage system is provided which makes provable the status of a file stored in a storage server at a time specified by a user and creates evidence information that will be effective in future. In response to a file status fixing request from the user (102) over a network (101), a storage server (103) generates file fixing guarantee data (1050), including data (1051) publicized by a publication server (105), and saves the generated data with the file associated with the generated data.

公开(公告)号：EP1243999B1

公开(公告)日：2013-03-20

申请号：EP01109952.0

申请日：2001-04-24

申请人： Hitachi, Ltd.

发明人： Miyazaki, Kunihiko ,  Yoshiura, Hiroshi ,  Susaki, Seiichi ,  Sasaki, Ryoichi ,  Takaragi, Kazuo ,  Toyoshima, Hisashi ,  Matsuki, Takeshi

IPC分类号： G06F21/64

CPC分类号： G06F21/645 ,  G06F21/64 ,  G06F2221/2101 ,  G06Q20/3825 ,  H04L9/3252 ,  H04L63/0428 ,  H04L63/12 ,  H04L2209/38 ,  H04L2209/56 ,  H04L2209/60

公开(公告)号：EP1895739A3

公开(公告)日：2008-10-22

申请号：EP07017296.0

申请日：2007-09-04

申请人： Hitachi, Ltd.

发明人： Hatano, Yasuo ,  Miyazaki, Kunihiko ,  Matsumoto, Kenji ,  Shimizu, Yoji

IPC分类号： H04L29/06

CPC分类号： H04L9/0833 ,  G06F21/6209 ,  G06F2221/2107 ,  H04L9/0825 ,  H04L9/0869 ,  H04L9/0891 ,  H04L63/0442 ,  H04L63/062 ,  H04L2209/60

摘要： An encryption processing part of a controller of each of user devices specifies components of content as encryption target parts, creates an encryption key creation key by reading out a public key, for each of the encryption target parts, of a second user who is allowed to view the encryption target part, raising a secret key of an administrator of the content data to the power of the public key thus read out, and calculating a remainder, encrypts random numbers each corresponding to each of the encryption target parts by using the encryption key creation key, creates an encryption key for each of the encryption target parts, and encrypts, by using the encryption key created for each of the encryption target parts, each of the encryption target parts corresponding to the encryption key.

公开(公告)号：EP1318645A3

公开(公告)日：2005-04-20

申请号：EP02003597.8

申请日：2002-02-15

申请人： Hitachi, Ltd.

发明人： Ito, Shinji ,  Miyazaki, Kunihiko ,  Echizen, Isao

IPC分类号： H04L29/06 ,  H04L12/58 ,  G06F1/00

CPC分类号： H04L51/14 ,  H04L12/2803 ,  H04L63/04 ,  H04L63/105

摘要： A network system capable of preventing the leakage of a confidential file (107) by an inadvertent act of a transmitting party and capable of meeting the requirement for an arbitrary file format is disclosed. A label indicating a security level (202; 1402) ("confidential" or "unclassified") is attached to the file (107) in a client terminal (101), which transmits the labeled file (107) outside. A transmission management program (119) on a gateway server (118) checks the label of the file (107), and in the case where the security level (202; 1402) is "unclassified", transmits the file (107) to an external network (121). Also, a label management program (109) manages the labeled file (107) in the client terminal (101).

摘要翻译： 公开了一种能够通过发送方的无意的动作来防止机密文件（107）泄漏并且能够满足任意文件格式的要求的网络系统。 指示安全级别（202; 1402）（“机密”或“未分类”）的标签被附加到在外部发送标记文件（107）的客户终端（101）中的文件（107）。 网关服务器（118）上的传输管理程序（119）检查文件（107）的标签，并且在安全级别（202; 1402）为“未分类”的情况下，将文件（107）发送到 外部网络（121）。 此外，标签管理程序（109）管理客户终端（101）中的标记文件（107）。

公开(公告)号：EP1253502A2

公开(公告)日：2002-10-30

申请号：EP02003596.0

申请日：2002-02-15

申请人： Hitachi, Ltd.

发明人： Miyazaki, Kunihiko ,  Ito, Shinji ,  Yoshiura, Hiroshi ,  Takaragi, Kazuo ,  Arai, Masato ,  Arai, Toshiaki ,  Matsuki, Takeshi ,  Toyoshima, Hisashi

IPC分类号： G06F1/00

CPC分类号： G06F21/6218 ,  G06F2211/009 ,  G06F2221/2113

摘要： Techniques of improving the safety of an information processing system (1001) at low cost are provided, the information processing system having an OS provided with an access control function based upon discretionary access control for preventing illegal accesses to files. A method and apparatus for providing the information processing system with functions and areas (1007) usable only by a specific user different from a system administrator. The areas are provided with an access control function in order to prevent the access control function from being tampered.

摘要翻译： 提供了以低成本提高信息处理系统（1001）的安全性的技术，该信息处理系统具有基于用于防止非法访问文件的任意访问控制的具有访问控制功能的OS。 一种用于向信息处理系统提供功能和区域（1007）的方法和装置，所述功能和区域（1007）仅可由不同于系统管理员的特定用户使用。 这些区域具有访问控制功能，以防止访问控制功能被篡改。

公开(公告)号：EP1942438A2

公开(公告)日：2008-07-09

申请号：EP07024976.8

申请日：2007-12-21

申请人： Hitachi, Ltd.

发明人： Miyazaki, Kunihiko ,  Hatano, Yasuo

IPC分类号： G06F21/24

CPC分类号： G06F21/64

摘要： The present invention provides an electronic document authenticity assuring method in which a series of procedures concerning redactable signature are divided into procedures dependent on a document to be signed and procedures dependent on a redactable signature method. Further, the present invention provides program codes that realize the divided procedures and a system comprising apparatuses for implementing those program codes. According to the present invention, even when type of electronic document to be signed is changed or added to, it is sufficient to add a procedure dependent on a document to be signed, without changing procedures dependent on redactable signature methods. Similarly, even when a redactable signature method is to be changed or added, it is sufficient to add a procedure dependent on the redactable signature method without changing procedures dependent on document to be signed.

摘要翻译： 本发明提供了依赖于redactable签名方法的电子文档的真实性保证方法，其中一系列关于redactable签名程序分为依赖于文件的程序进行签名和程序。 此外，本发明提供的程序代码并实现分割的程序和装置，其包括用于执行这些程序代码的系统。 。根据本发明，即使当要签名的电子文档的类型被改变或添加到，它是足够的添加依赖于文件要签名的程序，在不改变依赖于redactable签名方法的程序。 类似地，即使当redactable签名方法将被改变或添加，它是足够的添加取决于redactable签名方法的过程不改变程序依赖文档进行签名。

公开(公告)号：EP1562320B1

公开(公告)日：2007-05-02

申请号：EP04006261.4

申请日：2004-03-16

申请人： Hitachi, Ltd.

发明人： Tanimoto, Koichi ,  Miyazaki, Kunihiko ,  Itoh, Shinji ,  Omoto, Narihiro

IPC分类号： H04L9/32 ,  G06F1/00

CPC分类号： H04L9/3247 ,  H04L2209/38

公开(公告)号：EP1243999A3

公开(公告)日：2006-05-17

申请号：EP01109952.0

申请日：2001-04-24

申请人： Hitachi, Ltd.

发明人： Miyazaki, Kunihiko ,  Yoshiura, Hiroshi ,  Susaki, Seiichi ,  Sasaki, Ryoichi ,  Takaragi, Kazuo ,  Toyoshima, Hisashi ,  Matsuki, Takeshi

IPC分类号： G06F1/00

CPC分类号： G06F21/645 ,  G06F21/64 ,  G06F2221/2101 ,  G06Q20/3825 ,  H04L9/3252 ,  H04L63/0428 ,  H04L63/12 ,  H04L2209/38 ,  H04L2209/56 ,  H04L2209/60

摘要： According to the present invention, techniques, including a method and system, for restoring and/or validating data and/or associated signature log entries are provided. One embodiment of the present invention provides a method for validating a restored message, having an entry generated in a signature log for a message, where the entry includes cryptographic information associated with the message; Next, when message is lost, the restored message is generated responsive to a request; and the restored message is validated using the signature log. In another embodiment a method for validating a selected log entry by using a signature log having a plurality of recorded log entries is provided. The method includes: computing a cryptographic value for the selected log entry; and determining if the cryptographic value is part of another recorded log entry.

公开(公告)号：EP1562320A1

公开(公告)日：2005-08-10

申请号：EP04006261.4

申请日：2004-03-16

申请人： Hitachi, Ltd.

发明人： Tanimoto, Koichi ,  Miyazaki, Kunihiko ,  Itoh, Shinji ,  Omoto, Narihiro

IPC分类号： H04L9/32 ,  G06F1/00

CPC分类号： H04L9/3247 ,  H04L2209/38

摘要： To provide a verification record preservation function for keeping for a long time an evidential property of a verified signature to a user side apparatus (101-103) and to provide services for insuring reliability of a signature of a user. A verification record preservation program creates a verification log recording a verification object signature, a signature log and a deposited publication signature log entry that are used for verification. A publishing organization side apparatus (104) provides services that can reliably execute chain verification with reliability while taking convenience of users into consideration, such as a publication reminder service for preventing forgetfulness of publication, a publication notice for notifying publication of other user, verification vicarious execution for a user, and so forth.

摘要翻译： 要保持很长一段时间的证据一个验证人签名的属性设置为用户侧设备（101-103）提供验证记录保存功能，并为确保用户的签名的可靠性提供服务。 一个验证记录保存程序创建一个验证日志记录作为验证对象签名，签名日志和沉积的出版物签名日志条目也被用于验证。 甲出版机构侧装置（104）提供的服务做可以可靠地执行链验证与可靠性，同时服用的用户便利性的考虑，检测作为出版物提醒服务为防止出版物的健忘，用于通知otheruser出版的出版物通知，验证替代 执行对用户，等等。