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1. 发明专利

DE60127516D1 未知
公开(公告)号：DE60127516D1
公开(公告)日：2007-05-10
申请号：DE60127516
申请日：2001-02-22
申请人： HITACHI LTD
发明人： MIYAZAKI KUNIHIKO , SASAKI RYOICHI , TAKARAGI KAZUO , SUSAKI SEIICHI , MISHIMA HISANORI , MATSUKI TAKESHI , TAKEUCHI KUNIHITO , IWAMURA MITSURU , MATSUMOTO TSUTOMU
IPC分类号： H04L9/32 , G06F19/00 , G06Q10/00 , G06Q50/00 , G06Q50/10 , G06Q50/26 , G09C1/00
摘要： In a signature generating method where not necessarily all of a plurality of signature generating devices work together each time to generate signatures, the present invention seeks to correctly and securely reflect data relating to previous signatures. When generating signatures, the data used for the next signature is sent beforehand to the other signature generating devices. Also, when generating signatures, at least one of the devices is used consecutively, thus allowing history data to be shared during signature generation.

2. 发明专利

AU3887901A Method and system for recovering the validity of cryptographically signed digital data 未知
公开(公告)号：AU3887901A
公开(公告)日：2002-09-26
申请号：AU3887901
申请日：2001-04-26
申请人： HITACHI LTD
发明人： MIYAZAKI KUNIHIKO , MATSUKI TAKESHI , TOYOSHIMA HISASHI , TAKARAGI KAZUO , SASAKI RYOICHI , SUSAKI SEIICHI , YOSHIURA HIROSHI
IPC分类号： G09C1/00 , G06F21/00 , H04L9/32 , G06F12/16
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.

3. 发明专利

DE60127516T2 未知
公开(公告)号：DE60127516T2
公开(公告)日：2007-12-13
申请号：DE60127516
申请日：2001-02-22
申请人： HITACHI LTD
发明人： MIYAZAKI KUNIHIKO , SASAKI RYOICHI , TAKARAGI KAZUO , SUSAKI SEIICHI , MISHIMA HISANORI , MATSUKI TAKESHI , TAKEUCHI KUNIHITO , IWAMURA MITSURU , MATSUMOTO TSUTOMU
IPC分类号： H04L9/32 , G06F19/00 , G06Q10/00 , G06Q50/00 , G06Q50/10 , G06Q50/26 , G09C1/00
摘要： In a signature generating method where not necessarily all of a plurality of signature generating devices work together each time to generate signatures, the present invention seeks to correctly and securely reflect data relating to previous signatures. When generating signatures, the data used for the next signature is sent beforehand to the other signature generating devices. Also, when generating signatures, at least one of the devices is used consecutively, thus allowing history data to be shared during signature generation.

4. 发明专利

SG120979A1 Method and system for recovering the validity of cryptographically signed digital data 未知
公开(公告)号：SG120979A1
公开(公告)日：2006-04-26
申请号：SG200402019
申请日：2001-04-27
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： G06F21/00 , G09C1/00 , H04L9/32
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.

5. 发明专利

AU758676B2 Method and system for recovering the validity of cryptographically signed digital data 未知
公开(公告)号：AU758676B2
公开(公告)日：2003-03-27
申请号：AU3887901
申请日：2001-04-26
申请人： HITACHI LTD
发明人： MIYAZAKI KUNIHIKO , YOSHIURA HIROSHI , SUSAKI SEIICHI , SASAKI RYOICHI , TOYOSHIMA HISASHI , TAKARAGI HISASHI , MATSUKI TAKESHI
IPC分类号： G09C1/00 , G06F21/00 , H04L9/32 , G06F12/16
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.

6. 发明专利

AU1889699A Method and system for executing mobile code 未知
公开(公告)号：AU1889699A
公开(公告)日：2000-08-01
申请号：AU1889699
申请日：1999-01-13
申请人： HITACHI LTD
发明人： KAJI TADASHI , SUSAKI SEIICHI , AKAOSUGI TAKASHI
IPC分类号： G06F21/00 , G06F9/06

7. 发明专利

DE69816400T2 未知
公开(公告)号：DE69816400T2
公开(公告)日：2004-06-09
申请号：DE69816400
申请日：1998-11-02
申请人： HITACHI LTD
发明人： SUSAKI SEIICHI , UMEZAWA KATSUYUKI , KAJI TADASHI , TEZUKA SATORU , SASAKI RYOICHI , TABATA KUNIAKI , AKAOSUGI TAKASHI , KITO AKIRA
IPC分类号： G06F12/00 , G06F1/00 , G06F9/46 , G06F13/00 , G06F21/00 , H04L29/06
摘要： A distributed object system comprising at least one object distributing server, at least one client terminal and at least one server object execution server according to the present invention, including: an object distributing server for storing an object program to which an electronic signature is affixed; a client terminal including means for down-loading the object program from the object distributing server, means for verifying the electronic signature affixed to the object program, means for executing the client object program when the completeness of the object program is confirmed and the user of the client terminal beforehand permits execution of the client object program which is electronically signed by a signatory, and means for transmitting the electronic signature affixed to the object program to a server object execution server; and a server object execution server including means for verifying the signature received, and means for supplying services to the user of the client terminal when the completeness of the object program is confirmed and the user and the object program permit use of the services in advance, which makes it possible to prevent a client object which is down-loaded to a client terminal through a network and executed therein from carrying out unjustified processing (not intended by a user using the client terminal) by using authority of the user.

8. 发明专利

DE69816400D1 未知
公开(公告)号：DE69816400D1
公开(公告)日：2003-08-21
申请号：DE69816400
申请日：1998-11-02
申请人： HITACHI LTD
发明人： SUSAKI SEIICHI , UMEZAWA KATSUYUKI , KAJI TADASHI , TEZUKA SATORU , SASAKI RYOICHI , TABATA KUNIAKI , AKAOSUGI TAKASHI , KITO AKIRA
IPC分类号： G06F12/00 , G06F1/00 , G06F9/46 , G06F13/00 , G06F21/00 , H04L29/06
摘要： A distributed object system comprising at least one object distributing server, at least one client terminal and at least one server object execution server according to the present invention, including: an object distributing server for storing an object program to which an electronic signature is affixed; a client terminal including means for down-loading the object program from the object distributing server, means for verifying the electronic signature affixed to the object program, means for executing the client object program when the completeness of the object program is confirmed and the user of the client terminal beforehand permits execution of the client object program which is electronically signed by a signatory, and means for transmitting the electronic signature affixed to the object program to a server object execution server; and a server object execution server including means for verifying the signature received, and means for supplying services to the user of the client terminal when the completeness of the object program is confirmed and the user and the object program permit use of the services in advance, which makes it possible to prevent a client object which is down-loaded to a client terminal through a network and executed therein from carrying out unjustified processing (not intended by a user using the client terminal) by using authority of the user.

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