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1. 发明申请

US20100205446A1 MULTI-LEVEL FILE DIGESTS 有权
标题翻译：多级文件数据
公开(公告)号：US20100205446A1
公开(公告)日：2010-08-12
申请号：US12766536
申请日：2010-04-23
申请人： Michael Frederick KENRICH , Yevgeniy Gutnik
发明人： Michael Frederick KENRICH , Yevgeniy Gutnik
IPC分类号： H04L9/18
CPC分类号： H04L63/105 , H04L9/3236 , H04L63/0428 , H04L2209/60
摘要： Multi-level file digests for electronic files are disclosed. A top level digest represents a single digest for the associated electronic file. Lower level digests represent digests for portions of the associated electronic file. The top level digest is derived from the lower level digests. The top level digest is useful for facilitating rapid comparison to determine whether electronic files are the same. In one embodiment, electronic files are encrypted with a block encryption scheme, and digests are efficiently calculated and stored on a block-by-block basis. Advantageously, when modifications to an encrypted electronic file occurs, only those modified blocks need to be processed to undergo decryption and re-encryption to determine the appropriate digest.
摘要翻译：公开了电子文件的多级文件摘要。顶级摘要表示相关联的电子文件的单个摘要。较低级别的摘要代表了相关电子文件的部分的摘要。顶级摘要源于较低级别的摘要。顶级摘要可用于促进快速比较以确定电子文件是否相同。在一个实施例中，使用块加密方案对电子文件进行加密，并且逐个基础地有效地计算和存储摘要。有利地，当对加密的电子文件进行修改时，仅需要处理那些经修改的块以进行解密和重新加密以确定适当的摘要。

2. 发明授权

US08301896B2 Multi-level file digests 有权
标题翻译：多级文件摘要
公开(公告)号：US08301896B2
公开(公告)日：2012-10-30
申请号：US12766536
申请日：2010-04-23
申请人： Michael Frederick Kenrich , Yevgeniy Gutnik
发明人： Michael Frederick Kenrich , Yevgeniy Gutnik
IPC分类号： G06F11/14 , H04L9/36
CPC分类号： H04L63/105 , H04L9/3236 , H04L63/0428 , H04L2209/60
摘要： Multi-level file digests for electronic files are disclosed. A top level digest represents a single digest for the associated electronic file. Lower level digests represent digests for portions of the associated electronic file. The top level digest is derived from the lower level digests. The top level digest is useful for facilitating rapid comparison to determine whether electronic files are the same. In one embodiment, electronic files are encrypted with a block encryption scheme, and digests are efficiently calculated and stored on a block-by-block basis. Advantageously, when modifications to an encrypted electronic file occurs, only those modified blocks need to be processed to undergo decryption and re-encryption to determine the appropriate digest.
摘要翻译：公开了电子文件的多级文件摘要。顶级摘要表示相关联的电子文件的单个摘要。较低级别的摘要代表了相关电子文件的部分的摘要。顶级摘要源于较低级别的摘要。顶级摘要可用于促进快速比较以确定电子文件是否相同。在一个实施例中，使用块加密方案对电子文件进行加密，并且逐个基础地有效地计算和存储摘要。有利地，当对加密的电子文件进行修改时，仅需要处理那些经修改的块以进行解密和重新加密以确定适当的摘要。

3. 发明授权

US07748045B2 Method and system for providing cryptographic document retention with off-line access 有权
标题翻译：提供离线访问密码文件保留的方法和系统
公开(公告)号：US07748045B2
公开(公告)日：2010-06-29
申请号：US10815229
申请日：2004-03-30
申请人： Michael Frederick Kenrich , Yevgeniy Gutnik
发明人： Michael Frederick Kenrich , Yevgeniy Gutnik
IPC分类号： H04K1/00
CPC分类号： H04L63/0428 , G06Q20/3674 , H04L63/062
摘要： Techniques for utilizing security criteria to implement document retention for electronic documents are disclosed. The security criteria can also limit when, how and where access to the electronic documents is permitted. The security criteria can pertain to keys (or ciphers) used to secure (e.g., encrypt) electronic files (namely, electronic documents), or to unsecure (e.g., decrypt) electronic files already secured. At least a portion of the security criteria can be used to implement document retention, namely, a document retention policy. After a secured electronic document has been retained for the duration of the document retention policy, the associated security criteria becomes no longer available, thus preventing subsequent access to the secured electronic document. In other words, access restrictions on electronic documents can be used to prevent access to electronic documents which are no longer to be retained.
摘要翻译：公开了利用安全标准来实现电子文档的文档保留的技术。安全标准还可以限制何时，何地和何地允许访问电子文件。安全标准可以涉及用于保护（例如，加密）电子文件（即，电子文档）或者不安全地（例如，解密）已经被保护的电子文件的密钥（或密码）。安全标准的至少一部分可用于实现文档保留，即文档保留策略。在文件保留政策期间保留了受保护的电子文档后，相关的安全标准将不再可用，从而阻止随后访问受保护的电子文档。换句话说，可以使用电子文件的访问限制来阻止访问不再被保留的电子文档。

4. 发明授权

US07707427B1 Multi-level file digests 有权
标题翻译：多级文件摘要
公开(公告)号：US07707427B1
公开(公告)日：2010-04-27
申请号：US10894493
申请日：2004-07-19
申请人： Michael Frederick Kenrich , Yevgeniy Gutnik
发明人： Michael Frederick Kenrich , Yevgeniy Gutnik
IPC分类号： H04L9/18 , H04L9/20
CPC分类号： H04L63/105 , H04L9/3236 , H04L63/0428 , H04L2209/60
摘要： Multi-level file digests for electronic files are disclosed. A top level digest represents a single digest for the associated electronic file. Lower level digests represent digests for portions of the associated electronic file. The top level digest is derived from the lower level digests. The top level digest is useful for facilitating rapid comparison to determine whether electronic files are the same. In one embodiment, electronic files are encrypted with a block encryption scheme, and digests are efficiently calculated and stored on a block-by-block basis. Advantageously, when modifications to an encrypted electronic file occurs, only those modified blocks need to be processed to undergo decryption and re-encryption to determine the appropriate digest.
摘要翻译：公开了电子文件的多级文件摘要。顶级摘要表示相关联的电子文件的单个摘要。较低级别的摘要代表了相关电子文件的部分的摘要。顶级摘要源于较低级别的摘要。顶级摘要可用于促进快速比较以确定电子文件是否相同。在一个实施例中，使用块加密方案对电子文件进行加密，并且逐个基础地有效地计算和存储摘要。有利地，当对加密的电子文件进行修改时，仅需要处理那些经修改的块以进行解密和重新加密以确定适当的摘要。

5. 发明授权

US07555558B1 Method and system for fault-tolerant transfer of files across a network 有权
标题翻译：通过网络对文件进行容错传输的方法和系统
公开(公告)号：US07555558B1
公开(公告)日：2009-06-30
申请号：US10642041
申请日：2003-08-15
申请人： Michael Frederick Kenrich , Hal S. Hildebrand , Senthilvasan Supramaniam
发明人： Michael Frederick Kenrich , Hal S. Hildebrand , Senthilvasan Supramaniam
IPC分类号： G06F15/16
CPC分类号： H04L67/06
摘要： Improved techniques for transferring files through a multi-tier computing environment are disclosed. The transfer of files across the multiple tiers of the computing environment can use staging at intermediate tiers to facilitate the file transfer. Each tier can include at least one computing machine that includes a file transfer manager. The file transfer managers at the computing machines in each of the multiple tiers serve to effectuate the file transfer through the multi-tier computing environment. In one embodiment, the multi-tier computing environment is a multi-tier file security system and the files being transferred are audit files.
摘要翻译：公开了通过多层计算环境传送文件的改进技术。文件跨越计算环境的多层传输可以使用中间层的分段来方便文件传输。每个层可以包括至少一个包括文件传输管理器的计算机。多层中的每个计算机中的文件传输管理器用于通过多层计算环境实现文件传输。在一个实施例中，多层计算环境是多层文件安全系统，正在传输的文件是审计文件。

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