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1. 发明授权

US06185304B2 Method and apparatus for a symmetric block cipher using multiple stages 失效
标题翻译：使用多个阶段的对称块密码的方法和装置
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。

2. 发明授权

US06189095B1 Symmetric block cipher using multiple stages with modified type-1 and type-3 feistel networks 失效
标题翻译：对称分组密码，使用多个修改类型1和3型网络的阶段
公开(公告)号：US06189095B1
公开(公告)日：2001-02-13
申请号：US09092125
申请日：1998-06-05
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： H04L900
CPC分类号： H04L9/0625 , H04L9/002 , H04L2209/08 , H04L2209/24
摘要： The present invention provides a technique, system, and computer program for a symmetric key block cipher. This cipher uses multiple stages with a modified Type-3 Feistel network, and a modified Unbalanced Type-1 Feistel network in an expansion box forward function. The cipher allows the block size, key size, number of rounds of expansion, and number of stages of ciphering to vary. The modified Type-3 cipher modifies the word used as input to the expansion box in certain rounds, to speed the diffusion properties of the ciphering. The modified Type-3 and Type-1 ciphers are interleaved, and provide excellent resistance to both linear and differential attacks. The variable-length subkeys and the S-box can be precomputed. A minimal amount of computer storage is required to implement this cipher, which can be implemented equally well in hardware or software (or some combination thereof).
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。该密码在扩展箱前向功能中使用具有修改的Type-3 Feistel网络和修改的不平衡类型1 Feistel网络的多个阶段。密码允许块大小，密钥大小，扩展次数和加密阶段数量的变化。修改后的Type-3密码在某些回合中修改了用作扩展箱输入的字，以加快加密的扩散性能。修改后的Type-3和Type-1密码是交错的，并且对线性和差分攻击提供出色的阻力。可以预先计算可变长度子项和S盒。需要最少量的计算机存储来实现该密码，这可以在硬件或软件（或其某种组合）中同样良好地实现。

3. 发明授权

US06185679B2 Method and apparatus for a symmetric block cipher using multiple stages with type-1 and type-3 feistel networks 失效
标题翻译：用于使用具有1型和3型feistel网络的多级的对称块密码的方法和装置
公开(公告)号：US06185679B2
公开(公告)日：2001-02-06
申请号：US09027769
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： H04L900
CPC分类号： H04L9/002 , H04L9/0625 , H04L2209/08 , H04L2209/12 , 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-1 and Type-3 are both used, each 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 data-dependent rotation 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。两种不同阶段都使用1型和3型Feistel。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数据相关旋转的新颖方式。

4. 发明授权

US06243470B1 Method and apparatus for advanced symmetric key block cipher with variable length key and block 失效
标题翻译：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。

5. 发明授权

US06192129B1 Method and apparatus for advanced byte-oriented symmetric key block cipher with variable length key and block 失效
标题翻译：用于具有可变长度密钥和块的高级字节对称密钥块密码的方法和装置
公开(公告)号：US06192129B1
公开(公告)日：2001-02-20
申请号：US09018630
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 byte-oriented 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字节取向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依赖逆替换，逆置换和反向混合。可变长度子密钥与数据无关，可以预先计算。

6. 发明授权

US06535607B1 Method and apparatus for providing interoperability between key recovery and non-key recovery systems 有权
公开(公告)号：US06535607B1
公开(公告)日：2003-03-18
申请号：US09184002
申请日：1998-11-02
申请人： Coimbatore S. Chandersekaran , Rosario Gennaro , Sarbari Gupta , Stephen M. Matyas, Jr. , David R. Safford , Nevenko Zunic
发明人： Coimbatore S. Chandersekaran , Rosario Gennaro , Sarbari Gupta , Stephen M. Matyas, Jr. , David R. Safford , Nevenko Zunic
IPC分类号： H04L900
CPC分类号： H04L9/0841 , H04L9/0894
摘要： A method and apparatus for ensuring that a key recovery-enabled (KR-enabled) system communicating with a non-KR-enabled system in a cryptographic communication system transmits the information necessary to permit key recovery by a key recovery entity. In a first embodiment, data is encrypted under a second key K that is generated as a one-way function of a first key K′ and a key recovery block KRB generated on the first key K′. The key recovery block KRB and the encrypted data e(K, data) are transmitted to the receiver, who cannot decrypt the data without regenerating the second key K from the first key K′ and the key recovery block KRB. In a second embodiment, data is encrypted under a second key K that is generated independently of the first key K′. A third key X, generated as a one-way function of the first key K′ and a key recovery block KRB generated on the second key K, is used to encrypt the XOR product Y of the first and second keys K′, K. The key recovery block KRB, the encrypted XOR product e(X, Y) and the encrypted data e(K, data) are transmitted to the receiver, who cannot decrypt the data without regenerating the third key X from the first key K′ and the key recovery block KRB, decrypting the XOR product Y using the regenerated third key X, and recombining the XOR product Y with the first key K″ to regenerate the second key K. In a third embodiment, an integrity value is computed on a key K and its key recovery block KRB. The integrity value and the key K are encrypted to form an encrypted portion of a key exchange block KEB, while the key recovery block KRB is put in an unencrypted portion of the key exchange block KEB, which is sent along with the encrypted data e(K, data) to the receiver. The receiver decrypts the encrypted portion, recomputes the integrity value and compares it with the received integrity value. Only if the two integrity values compare is the key K extracted and used to decrypt the data.

7. 发明授权

US6058188A Method and apparatus for interoperable validation of key recovery information in a cryptographic system 失效
标题翻译：用于密码系统中关键恢复信息的可互操作验证的方法和装置
公开(公告)号：US6058188A
公开(公告)日：2000-05-02
申请号：US899855
申请日：1997-07-24
申请人： Coimbatore S. Chandersekaran , Rosario Gennaro , Sarbari Gupta , Stephen M. Matyas, Jr. , David R. Safford , Nevenko Zunic
发明人： Coimbatore S. Chandersekaran , Rosario Gennaro , Sarbari Gupta , Stephen M. Matyas, Jr. , David R. Safford , Nevenko Zunic
IPC分类号： H04L9/08 , H04L9/32
CPC分类号： H04L9/3247 , H04L9/0894 , H04L9/3268
摘要： In a cryptographic communications system, a method and apparatus for allowing a sender of encrypted data to demonstrate to a receiver its ability to correctly generate key recovery information that is transmitted along with the encrypted data and from which law enforcement agents or others may recover the original encryption key. Initially, the sender generates a key pair comprising a private signature key and a corresponding public verification key and sends the latter to a key recovery validation service (KRVS). Upon a satisfactory demonstration by the sender of its ability to correctly generate key recovery information, the KRVS generates a certificate certifying the public verification key and the ability of the sender to correctly generate key recovery information. The sender uses its private signature key to generate a digital signature on the key recovery information, which is sent along with the key recovery information and encrypted data to the receiver. The receiver verifies the signature on the key recovery information using the certified public verification key and decrypts the encrypted data only if the signature is verified as being a valid signature.
摘要翻译：在加密通信系统中，允许加密数据的发送方向接收机证明正确地生成与加密数据一起发送的密钥恢复信息的能力的方法和装置，并且执法人员或其他人可以从其恢复原始加密密钥最初，发送者生成包括私有签名密钥和对应的公共验证密钥的密钥对，并将其发送到密钥恢复验证服务（KRVS）。在发送方能够正确生成密钥恢复信息的令人满意的演示之后，KRVS生成证明公共验证密钥的证书以及发送方正确生成密钥恢复信息的能力。发送方使用其私有签名密钥在密钥恢复信息上生成数字签名，密钥恢复信息与密钥恢复信息和加密数据一起发送给接收者。接收者使用经认证的公开验证密钥来验证密钥恢复信息上的签名，并且只有当签名被验证为有效签名时才对加密数据进行解密。

8. 发明授权

US07487359B2 Time stamping method employing a separate ticket and stub 失效
标题翻译：时间戳方法采用单独的机票和存根
公开(公告)号：US07487359B2
公开(公告)日：2009-02-03
申请号：US11846562
申请日：2007-08-29
申请人： Mohammad Peyravian , Allen Roginsky , Nevenko Zunic , Stephen M. Matyas, Jr.
发明人： Mohammad Peyravian , Allen Roginsky , Nevenko Zunic , Stephen M. Matyas, Jr.
IPC分类号： H04L9/00 , G06F7/04 , H04K1/00
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”。

9. 发明授权

US07315948B1 Time stamping method employing a separate ticket and stub 失效
标题翻译：时间戳方法采用单独的机票和存根
公开(公告)号：US07315948B1
公开(公告)日：2008-01-01
申请号：US09458921
申请日：1999-12-10
申请人： Mohammad Peyravian , Allen Roginsky , Nevenko Zunic , Stephen M. Matyas, Jr.
发明人： Mohammad Peyravian , Allen Roginsky , Nevenko Zunic , Stephen M. Matyas, Jr.
IPC分类号： H04L9/00 , G06F7/04 , H04K1/00
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”。

10. 发明授权

US06965998B1 Time stamping method using time-based signature key 失效
标题翻译：时间戳法使用基于时间的签名密钥
公开(公告)号：US06965998B1
公开(公告)日：2005-11-15
申请号：US09459187
申请日：1999-12-10
申请人： Mohammad Peyravian , Allen Roginsky , Nevenko Zunic , Stephen M. Matyas, Jr.
发明人： Mohammad Peyravian , Allen Roginsky , Nevenko Zunic , Stephen M. Matyas, Jr.
IPC分类号： H04K1/00 , H04L9/00 , H04L9/32
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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