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公开(公告)号：US07487359B2
公开(公告)日：2009-02-03
申请号：US11846562
申请日：2007-08-29
CPC分类号： H04L9/3297 , H04L9/3242
摘要： A time stamping protocol has two stages referred to as the ticketing stage and the certification stage. During the ticketing stage, the document or other identifying data is sent to the TSA. The TSA generates a “ticket” based on the document or other identifying data and a time indication derived from a trusted clock. The ticket, which serves as an unsigned time stamp receipt, is transmitted back to the document originator. During the certification stage, the holder of the ticket requests a certified time stamp receipt by presenting the ticket to the TSA. The TSA verifies the ticket and generates a signed time stamp receipt, called the ticket stub, which is then transmitted back to the document originator. The ticket stub serves as a “universal time-stamp” that the holder of the ticket stub can use to prove the date of the document.
摘要翻译： 时间戳协议有两个阶段，称为票务阶段和认证阶段。 在票务阶段，文件或其他识别数据被发送到TSA。 TSA根据文档或其他标识数据和从可信时钟导出的时间指示生成“票证”。 作为未签名的时间戳收据的票据被传回给文件发起者。 在认证阶段，机票持有人通过向TSA提供机票来申请经过认证的时间戳收据。 TSA验证票据并生成一个称为票据存根的签名时间戳收据，然后将其传回给文档发起者。 票据桩作为票据存根的持有者可以用来证明文件的日期的“通用时间戳”。
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公开(公告)号：US07315948B1
公开(公告)日：2008-01-01
申请号：US09458921
申请日：1999-12-10
CPC分类号： H04L9/3297 , H04L9/3242
摘要： A time stamping protocol has two stages referred to as the ticketing stage and the certification stage. During the ticketing stage, the document or other identifying data is sent to the TSA. The TSA generates a “ticket” based on the document or other identifying data and a time indication derived from a trusted clock. The ticket, which serves as an unsigned time stamp receipt, is transmitted back to the document originator. During the certification stage, the holder of the ticket requests a certified time stamp receipt by presenting the ticket to the TSA. The TSA verifies the ticket and generates a signed time stamp receipt, called the ticket stub, which is then transmitted back to the document originator. The ticket stub serves as a “universal time-stamp” that the holder of the ticket stub can use to prove the date of the document.
摘要翻译： 时间戳协议有两个阶段，称为票务阶段和认证阶段。 在票务阶段，文件或其他识别数据被发送到TSA。 TSA根据文档或其他标识数据和从可信时钟导出的时间指示生成“票证”。 作为未签名的时间戳收据的票据被传回给文件发起者。 在认证阶段，机票持有人通过向TSA提交机票来申请经过认证的时间戳收据。 TSA验证票据并生成一个称为票据存根的签名时间戳收据，然后将其传回给文档发起者。 票据桩作为票据存根的持有者可以用来证明文件的日期的“通用时间戳”。
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公开(公告)号：US06965998B1
公开(公告)日：2005-11-15
申请号：US09459187
申请日：1999-12-10
CPC分类号： H04L9/3297 , H04L2209/60
摘要： A time-stamping protocol for time-stamping digital documents uses a time-based signature key. A document or other identifying data is sent to a time stamping authority TSA. The TSA has a time-based signature key that the TSA uses to sign time stamp receipts. The signature key is associated with a fixed time reference that is stored in a public key certificate also containing the public verification key. Upon receiving the document, the TSA creates a time stamp receipt by computing a time difference between the time reference associated with the signature key and the time the document was received. The time difference is appended to the document to create a time stamp receipt and the receipt is then signed by the TSA and transmitted to the requestor.
摘要翻译： 时间戳数字文档的时间戳协议使用基于时间的签名密钥。 文件或其他识别数据被发送到时间戳机构TSA。 TSA具有TSA用于签署时间戳收据的基于时间的签名密钥。 签名密钥与存储在还包含公共验证密钥的公开密钥证书中的固定时间基准相关联。 在接收到文档时，TSA通过计算与签名密钥相关联的时间参考与文档被接收的时间之间的时间差来创建时间戳接收。 时间差附加到文档以创建时间戳收据，然后TSA签收收据并传送给请求者。
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公开(公告)号：US06742119B1
公开(公告)日：2004-05-25
申请号：US09458937
申请日：1999-12-10
IPC分类号： H04L900
CPC分类号： H04L9/3297 , H04L2209/60
摘要： A method for time stamping a digital document is disclosed. The document originator creates a time stamp receipt by combining the document and a digital time indication. The time stamp receipt is submitted to a time stamping agent having a trusted clock. The time stamping agent optionally validates the time stamp receipt and then computes the age of the time stamp receipt. If valid, the time stamping agent certifies the time stamp receipt by signing the time stamp receipt with a private signature key. The private signature key is selected from a group of signature keys by the time stamping agent based on the computed age of the time stamp receipt.
摘要翻译： 公开了一种用于时间戳数字文档的方法。 文档创建者通过组合文档和数字时间指示来创建时间戳收据。 时间戳收据提交给具有可信时钟的时间戳代理。 时间戳代理可选地验证时间戳收据，然后计算时间戳收据的年龄。 如果有效，则时间戳代理人通过使用私人签名密钥签署时间戳接收来证明时间戳接收。 基于所计算的时间戳收据的年龄，由时间戳代理从一组签名密钥中选择私人签名密钥。
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公开(公告)号：US07519824B1
公开(公告)日：2009-04-14
申请号：US09458410
申请日：1999-12-10
CPC分类号： H04L9/3297 , H04L2209/60
摘要： A method for time stamping a digital document employs a two-part time stamp receipt. The first part of the time stamp receipt includes identifying data associated with a document and a nonce. The second part of the time stamp receipt includes a time indication and the nonce. The nonce serves as a link between the first and second parts.
摘要翻译： 用于时间戳数字文档的方法采用两部分时间戳收据。 时间戳收据的第一部分包括与文档和随机数相关联的识别数据。 时间戳收据的第二部分包括时间指示和随机数。 该随机数作为第一和第二部分之间的链接。
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公开(公告)号：US07490241B1
公开(公告)日：2009-02-10
申请号：US09458922
申请日：1999-12-10
IPC分类号： H04L9/00
CPC分类号： H04L9/3297 , H04L2209/60
摘要： A method for time stamping a digital document is disclosed. The document originator creates a time stamp receipt using the document and the current time. The time stamp receipt is submitted to a time stamping authority having a trusted clock. The time stamping authority validates the time stamp receipt by comparing the time value specified in the time stamp receipt to the current time. If the time value specified in the time stamp receipt is within a predetermined time window, the time stamping authority cryptographically binds the time value and document, or the time value and some representation of the document, e.g., by signing the time stamp receipt with its private signature key.
摘要翻译： 公开了一种用于时间戳数字文档的方法。 文档创建者使用文档和当前时间创建时间戳收据。 时间戳收据提交给具有可信时钟的时间戳机构。 时间戳权限通过将时间戳收据中指定的时间值与当前时间进行比较来验证时间戳收据。 如果时间戳收据中指定的时间值在预定的时间窗口内，则时间戳机构将时间值和文档加密地绑定，或者时间值和文档的某些表示，例如通过签署时间戳 私人签名密钥。
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公开(公告)号：US06993656B1
公开(公告)日：2006-01-31
申请号：US09458928
申请日：1999-12-10
IPC分类号： H04L9/00
CPC分类号： H04L9/3297 , H04L63/123 , H04L2209/60 , H04L2463/121
摘要： A method for time stamping a digital document is disclosed. The document originator creates a time stamp receipt by combining the document or other identifying data and a digital time indication. The time stamp receipt is submitted to a time stamping authority having a trusted clock. The time stamping authority optionally validates the time stamp receipt and then computes the age of the time stamp receipt. The time stamping authority creates an aged time stamp receipt by combining the identifying data and time indication contained in the submitted time stamp receipt with the computed age of the time stamp receipt. The time stamping authority cryptographically binds the time information and identifying data in the aged time stamp receipt, e.g., by signing the combination of the identifying data, time indication, and computed age with a private signature generation key.
摘要翻译： 公开了一种用于时间戳数字文档的方法。 文档发起者通过组合文档或其他识别数据和数字时间指示来创建时间戳接收。 时间戳收据提交给具有可信时钟的时间戳机构。 时间戳权限可选地验证时间戳收据，然后计算时间戳收据的年龄。 时间戳权力通过将提交的时间戳收据中包含的识别数据和时间指示与计算的时间戳收据的年龄组合来创建老化的时间戳收据。 时间戳权限例如通过用私有签名生成密钥签名识别数据，时间指示和计算的年龄的组合来密码地绑定时间信息和识别老化时间戳收据中的数据。
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公开(公告)号：US20070294537A1
公开(公告)日：2007-12-20
申请号：US11846562
申请日：2007-08-29
IPC分类号： H04L9/00
CPC分类号： H04L9/3297 , H04L9/3242
摘要： A time stamping protocol has two stages referred to as the ticketing stage and the certification stage. During the ticketing stage, the document or other identifying data is sent to the TSA. The TSA generates a “ticket” based on the document or other identifying data and a time indication derived from a trusted clock. The ticket, which serves as an unsigned time stamp receipt, is transmitted back to the document originator. During the certification stage, the holder of the ticket requests a certified time stamp receipt by presenting the ticket to the TSA. The TSA verifies the ticket and generates a signed time stamp receipt, called the ticket stub, which is then transmitted back to the document originator. The ticket stub serves as a “universal time-stamp” that the holder of the ticket stub can use to prove the date of the document
摘要翻译： 时间戳协议有两个阶段，称为票务阶段和认证阶段。 在票务阶段，文件或其他识别数据被发送到TSA。 TSA根据文档或其他标识数据和从可信时钟导出的时间指示生成“票证”。 作为未签名的时间戳收据的票据被传回给文件发起者。 在认证阶段，机票持有人通过向TSA提交机票来申请经过认证的时间戳收据。 TSA验证票据并生成一个称为票据存根的签名时间戳收据，然后将其传回给文档发起者。 票据存根是票据存根持有人可以用来证明文件的日期的“通用时间戳”
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9.发明授权Method and apparatus for advanced symmetric key block cipher with variable length key and block 失效具有可变长度密钥和块的高级对称密钥块密码的方法和装置公开(公告)号：US06243470B1
公开(公告)日：2001-06-05
申请号：US09018707
申请日：1998-02-04
申请人： Don Coppersmith , Rosario Gennaro , Shai Halevi , Charanjit S. Jutla , Stephen M. Matyas, Jr. , Mohammed Peyravian , David Robert Safford , Nevenko Zunic
发明人： Don Coppersmith , Rosario Gennaro , Shai Halevi , Charanjit S. Jutla , Stephen M. Matyas, Jr. , Mohammed Peyravian , David Robert Safford , Nevenko Zunic
IPC分类号： H04L906
CPC分类号： H04L9/0625 , H04L2209/08 , H04L2209/24
摘要： A method and apparatus for an advanced symmetric key cipher for encryption and decryption, using a block cipher algorithm. Different block sizes and key sizes are supported, and a different sub-key is used in each round. Encryption is computed using a variable number of rounds of mixing, permutation, and key-dependent substitution. Decryption uses a variable number of rounds of key-dependent inverse substitution, inverse permutation and inverse mixing. The variable length sub-keys are data-independent, and can be precomputed.
摘要翻译： 一种用于加密和解密的高级对称密钥密码的方法和装置，使用块密码算法。 支持不同的块大小和密钥大小，每轮中使用不同的子密钥。 使用可变数量的混合，置换和密钥依赖替换来计算加密。 解密使用可变数量的密钥相关逆替换，逆置换和反相混合。 可变长度子密钥与数据无关，可以预先计算。
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10.发明授权公开(公告)号：US06185304B2
公开(公告)日：2001-02-06
申请号：US09027765
申请日：1998-02-23
申请人： Don Coppersmith , Rosario Gennaro , Shai Halevi , Charanjit S. Jutla , Stephen M. Matyas, Jr. , Luke James O'Connor , Mohammed Peyravian , David Robert Safford , Nevenko Zunic
发明人： Don Coppersmith , Rosario Gennaro , Shai Halevi , Charanjit S. Jutla , Stephen M. Matyas, Jr. , Luke James O'Connor , Mohammed Peyravian , David Robert Safford , Nevenko Zunic
IPC分类号： H04K100
CPC分类号： H04L9/002 , H04L9/0625 , H04L2209/24
摘要： The present invention provides a technique, system, and computer program for a symmetric key block cipher. Variable block sizes and key sizes are supported, as well as a variable number of rounds. The cipher uses multiple stages of processing, where the stages have different structures and different subround functions, to provide excellent resistance to both linear and differential attacks. Feistel Type-3 networks are used, with different networks during different stages. The number of rounds may vary among stages. Subkeys are used in some, but not all, stages. The variable-length keys can be precomputed. A novel manner of using multiplication in a cipher is defined.
摘要翻译： 本发明提供了一种用于对称密钥块密码的技术，系统和计算机程序。 支持可变块大小和密钥大小，以及可变数目的轮次。 密码器使用多个处理阶段，其中阶段具有不同的结构和不同的子区域功能，以提供对线性和差分攻击的极好抵抗。 使用Feistel Type-3网络，在不同阶段使用不同的网络。 轮次数可能会有所不同。 子项在某些（但不是全部）阶段中使用。 可变长度键可以预先计算。 定义了在密码中使用乘法的新颖方式。
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