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公开(公告)号：US07743253B2
公开(公告)日：2010-06-22
申请号：US11267096
申请日：2005-11-04
申请人： Kristin E. Lauter , Denis X Charles , Kamal Jain
发明人： Kristin E. Lauter , Denis X Charles , Kamal Jain
IPC分类号： H04L9/32
CPC分类号： H04L9/3073 , H04L9/008 , H04L9/3247 , H04L2209/60
摘要： Digital signatures for network coding are described. In one aspect, digital signatures for network coding are described. In one aspect, segmented blocks of content for distribution are digitally signed using homomorphic digital signatures generated from an elliptic curve. A linear combination of packets comprising the digitally signed content is distributed to a destination device according to an implemented distribution scheme. The linear combination of packets includes public information when digitally signing the segmented blocks. The homomorphic digital signatures and the public information allow a device receiving one or more packets of the linear combination of packets to verify and authenticate content associated with the one of our packets independent of secure transmission of secret keys and hash digests used to digitally sign the one or more packets.
摘要翻译： 描述了用于网络编码的数字签名。 在一个方面，描述了用于网络编码的数字签名。 在一个方面，用于分发的内容分段块使用从椭圆曲线生成的同形数字签名进行数字签名。 根据实施的分配方案，将包括数字签名的内容的分组的线性组合分发到目的地设备。 数字线路组合包括在分段块数字签名时的公开信息。 同态数字签名和公共信息允许接收分组的线性组合的一个或多个分组的设备来验证和认证与我们的一个分组相关联的内容，独立于秘密密钥的安全传输和用于数字签名的一些散列摘要 或更多数据包。
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公开(公告)号：US20080148054A1
公开(公告)日：2008-06-19
申请号：US11611624
申请日：2006-12-15
申请人： Jason Cahill , Denis X. Charles , Kamal Jain , Kristin E. Lauter
发明人： Jason Cahill , Denis X. Charles , Kamal Jain , Kristin E. Lauter
CPC分类号： G06F21/64 , H04L9/3247 , H04L2209/60
摘要： Systems and methods for secure signatures are described. In one aspect, a secure signature is generated. The secure signature strongly binds an image of an electronic signature (an “electronic signature”) to content in either electronic or printed form. Responsive to receiving a request from a user, the systems and methods determine whether an electronic signature associated with a printed page represents a secure signature. If so, the systems and methods determine and notify the user of whether the secure signature was cryptographically bound by a signer of the electronic signature to the content being signed.
摘要翻译： 描述用于安全签名的系统和方法。 一方面，生成安全签名。 安全签名将电子签名（“电子签名”）的图像强制地绑定到电子或打印形式的内容。 响应于从用户接收请求，系统和方法确定与打印页面相关联的电子签名是否代表安全签名。 如果是这样，系统和方法确定并通知用户安全签名是否被电子签名的签名者加密地绑定到被签名的内容。
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公开(公告)号：US20080301448A1
公开(公告)日：2008-12-04
申请号：US11757282
申请日：2007-06-01
申请人： Denis X. Charles , Kamal Jain , Kristin E. Lauter , Jin Li , Dan Teodosiu
发明人： Denis X. Charles , Kamal Jain , Kristin E. Lauter , Jin Li , Dan Teodosiu
IPC分类号： H04L9/00
CPC分类号： H04L9/3066 , H04L9/008 , H04L9/3247 , H04L2209/60
摘要： Systems and methods for security against corruption for networked storage are described. In one aspect, a destination device receives a linear combination of packets. The linear combination of packets represents digitally signed blocks of content and public information used to digitally sign segmented blocks of content. The destination device recombines the linear combination of packets to compute new valid signatures as linear combinations of received homomorphic digital signatures. The new valid signatures are for verifying by a requesting computing device recovering data associated with at least a subset of the linear combination of packets, integrity of the at least a subset. This provides the requesting node with security against corruption of data in networked storage.
摘要翻译： 描述了用于联网存储的用于防止损坏的安全性的系统和方法。 在一个方面，目的地设备接收分组的线性组合。 分组的线性组合表示用于对分段内容块进行数字签名的数字签名的内容块和公共信息。 目的地设备将分组的线性组合重新组合以计算新的有效签名作为接收的同态数字签名的线性组合。 新的有效签名用于由请求的计算设备验证恢复与分组的线性组合的至少一个子集相关联的数据，至少一个子集的完整性。 这为请求节点提供了防止网络存储中的数据损坏的安全性。
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公开(公告)号：US20080141330A1
公开(公告)日：2008-06-12
申请号：US11567707
申请日：2006-12-06
申请人： Denis X. Charles , Kamal Jain , Kristin E. Lauter
发明人： Denis X. Charles , Kamal Jain , Kristin E. Lauter
CPC分类号： G06F21/64 , G06F21/6272
摘要： Systems and methods for digitally certified stationery are described. In one aspect, a stationery granting authority (SGA) receives a request from a user to generate a document. If the user is authorized for the requested document, the SGA generates a certificate with credentialing information from data in the request. The SGA generates a first digital signature from some of the credentialing information. The SGA communicates the certificate to the user for editing and distribution as the document. A recipient of the document determines whether the document is “official” by contacting a specified service to provide certain information from the document. The verification service computes a second digital signature from the provided information for comparison to the first digital signature. If there is a match, the service notifies the recipient that the document is valid/official. Otherwise, the recipient is notified that the document is not valid.
摘要翻译： 描述了数字认证的文具的系统和方法。 一方面，文具授予机构（SGA）从用户接收生成文档的请求。 如果用户被授权请求的文档，则SGA将从请求中的数据生成具有凭据信息的证书。 SGA从一些凭证信息生成第一个数字签名。 SGA将证书通信给用户进行编辑和分发作为文档。 文档的收件人通过联系指定的服务来确定文档是否“正式”，以从文档中提供某些信息。 验证服务根据提供的信息计算第二数字签名，以便与第一数字签名进行比较。 如果有匹配，则该服务通知收件人该文档是有效/正式的。 否则，通知收件人该文档无效。
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公开(公告)号：US07996677B2
公开(公告)日：2011-08-09
申请号：US11567707
申请日：2006-12-06
申请人： Denis X. Charles , Kamal Jain , Kristin E. Lauter
发明人： Denis X. Charles , Kamal Jain , Kristin E. Lauter
IPC分类号： H04L9/32
CPC分类号： G06F21/64 , G06F21/6272
摘要： Systems and methods for digitally certified stationery are described. In one aspect, a stationery granting authority (SGA) receives a request from a user to generate a document. If the user is authorized for the requested document, the SGA generates a certificate with credentialing information from data in the request. The SGA generates a first digital signature from some of the credentialing information. The SGA communicates the certificate to the user for editing and distribution as the document. A recipient of the document determines whether the document is “official” by contacting a specified service to provide certain information from the document. The verification service computes a second digital signature from the provided information for comparison to the first digital signature. If there is a match, the service notifies the recipient that the document is valid/official. Otherwise, the recipient is notified that the document is not valid.
摘要翻译： 描述了数字认证的文具的系统和方法。 一方面，文具授予机构（SGA）从用户接收生成文档的请求。 如果用户被授权请求的文档，则SGA将从请求中的数据生成具有凭据信息的证书。 SGA从一些凭证信息生成第一个数字签名。 SGA将证书通信给用户进行编辑和分发作为文档。 文档的收件人通过联系指定的服务来确定文档是否“正式”，以从文档中提供某些信息。 验证服务根据所提供的信息计算第二数字签名，以便与第一数字签名进行比较。 如果有匹配，则该服务通知收件人该文档是有效/正式的。 否则，通知收件人该文档无效。
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公开(公告)号：US20080301815A1
公开(公告)日：2008-12-04
申请号：US11756599
申请日：2007-05-31
申请人： Kristin E. Lauter , Denis X. Charles , Kamal Jain
发明人： Kristin E. Lauter , Denis X. Charles , Kamal Jain
IPC分类号： G06F7/04
CPC分类号： G03G21/04 , H04N1/32144 , H04N2201/3235 , H04N2201/3236 , H04N2201/327 , H04N2201/3271
摘要： Systems and methods to detect unauthorized changes to a printed document are described. In one aspect, a digital signature of original content associated with electronic document is embedded into the original content to create a content signed document. The systems and methods use the embedded digital signature to automatically determine whether text-based content associated with a printout of the content signed document was changed from the original content associated with the electronic document.
摘要翻译： 描述了检测未经授权的更改打印文档的系统和方法。 一方面，将与电子文档相关联的原始内容的数字签名嵌入到原始内容中以创建内容签名文档。 系统和方法使用嵌入式数字签名来自动确定与内容签名文档的打印输出相关联的基于文本的内容是否从与电子文档相关联的原始内容中改变。
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公开(公告)号：US07907726B2
公开(公告)日：2011-03-15
申请号：US11275629
申请日：2006-01-19
IPC分类号： G06F7/58
CPC分类号： G06F7/582 , H04L9/0662
摘要： Pseudorandom numbers may be generated from input seeds using expander graphs. Expander graphs are a collection of vertices that are interconnected via edges. Generally, a walk around an expander graph is determined responsive to an input seed, and a pseudorandom number is produced based on vertex names. Specifically, a next edge, which is one of multiple edges emanating from a current vertex, is selected responsive to an extracted seed chunk. The next edge is traversed to reach a next vertex. The name of the next vertex is ascertained and used as a portion of the pseudorandom number being produced by the walk around the expander graph.
摘要翻译： 可以使用扩展器图从输入种子生成伪随机数。 扩展器图是通过边缘互连的顶点的集合。 通常，响应于输入种子确定围绕扩展器图形的步行，并且基于顶点名称产生伪随机数。 具体地，响应于提取的种子块选择作为从当前顶点发出的多个边缘之一的下一个边缘。 遍历下一个边以到达下一个顶点。 确定下一个顶点的名称，并将其用作由扩展器图形围绕生成的伪随机数的一部分。
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公开(公告)号：US20090290714A1
公开(公告)日：2009-11-26
申请号：US12123688
申请日：2008-05-20
IPC分类号： H04L9/08
CPC分类号： H04L63/123 , G06F21/645 , H04L9/3242 , H04L9/3271 , H04L67/104
摘要： An exemplary method for verifying the integrity of remotely stored data includes providing a key; providing a fingerprint, the fingerprint generated using the key in a keyed cryptographic hash function as applied to data of known integrity; sending the key to a remote storage location that stores a copy of the data of known integrity; receiving a fingerprint from the remote storage location, the fingerprint generated using the key in a keyed cryptographic hash function as applied to the remotely stored copy of the data; and verifying the integrity of the remotely stored copy of the data based at least in part on comparing the provided fingerprint to the received fingerprint. Other exemplary methods, systems, etc., are also disclosed.
摘要翻译： 用于验证远程存储数据的完整性的示例性方法包括提供密钥; 提供指纹，使用密钥在密钥加密散列函数中生成的指纹，以应用于已知完整性的数据; 将密钥发送到存储已知完整性数据的副本的远程存储位置; 从所述远程存储位置接收指纹，使用所述密钥在密钥密码散列函数中生成的指纹应用于远程存储的数据副本; 以及至少部分地基于将所提供的指纹与所接收的指纹进行比较来验证远程存储的数据副本的完整性。 还公开了其它示例性方法，系统等。
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公开(公告)号：US07702098B2
公开(公告)日：2010-04-20
申请号：US11080303
申请日：2005-03-15
CPC分类号： G06F7/725
摘要： Systems and methods for elliptic curve octupling for weighted projective coordinates are described. In one aspect, a weighted projective point P on an elliptic curve is identified. 8P is computed from P independent of repeated doubling operations using fewer field multiplications.
摘要翻译： 描述用于加权投影坐标的椭圆曲线八倍体的系统和方法。 在一方面，识别椭圆曲线上的加权投影点P. 8P是从独立于使用较少的场乘法的重复加倍运算的P计算的。
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公开(公告)号：US07623655B2
公开(公告)日：2009-11-24
申请号：US11079642
申请日：2005-03-14
申请人： Kristin E. Lauter , Denis X Charles
发明人： Kristin E. Lauter , Denis X Charles
CPC分类号： G06F7/725
摘要： Systems and methods for computing modular polynomials modulo large primes are described. In one aspect, the systems and methods generate 1-isogenous elliptic curves. A modular polynomial modulo a large prime p is then computed as a function of 1-isogenous elliptic curves modulo p.
摘要翻译： 描述了用于计算模多项式模数大素数的系统和方法。 在一个方面，系统和方法产生一个一等椭圆曲线。 然后，以模p为单质椭圆曲线计算模数多模p的大素数p。
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