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1. 发明授权

US07634470B2 Efficient searching techniques 有权
公开(公告)号：US07634470B2
公开(公告)日：2009-12-15
申请号：US11189185
申请日：2005-07-25
申请人： Sanguthevar Rajasekaran , Rajendra A. Gopalakrishna
发明人： Sanguthevar Rajasekaran , Rajendra A. Gopalakrishna
IPC分类号： G06F7/00 , G06F17/30 , G06F17/00
CPC分类号： G06F17/30327 , G06F17/30985 , Y10S707/99932 , Y10S707/99933 , Y10S707/99934 , Y10S707/99935 , Y10S707/99942 , Y10S707/99943 , Y10S707/99944 , Y10S707/99945
摘要： The present invention describes techniques for performing searches in an efficient manner while minimizing the memory resources required to perform the searches. According to the techniques of the present invention, the number of comparisons needed to determine if a query element is in included in a set of elements is proportional to the length of the query element and independent of the number of elements in the set of elements.

2. 发明授权

US07454782B2 Method and system for camouflaging access-controlled data 有权
标题翻译：伪装访问控制数据的方法和系统
公开(公告)号：US07454782B2
公开(公告)日：2008-11-18
申请号：US10015902
申请日：2001-10-30
申请人： Sanguthevar Rajasekaran , Geoffrey R. Hird , Balas Natarajan Kausik
发明人： Sanguthevar Rajasekaran , Geoffrey R. Hird , Balas Natarajan Kausik
IPC分类号： H04L9/32
CPC分类号： G06F21/62 , H04L9/0863 , H04L9/3226
摘要： A computer-representable object (including, without limitation, a cryptographic key, or a graph or a Boolean description of a system) is secured using a generalized camouflaging technique. The secured object need not be stored in the system, not even in encrypted form. Instead, the technique employs a composition function that regenerates the secured object when one inputs a valid password (which may be any computer-representable information held by a user). By regenerating the secured object each time a valid password is entered, there is no need to store the secured object. If one inputs an invalid password, the technique may generate an incorrect object, such that the user is unable to distinguish this incorrect object from the secured object. If the user tries to use the incorrect object, the user can be exposed as unauthorized, without the user's knowledge that he has been exposed.
摘要翻译：使用广义伪装技术来确保计算机可表示的对象（包括但不限于密码密钥，或图形或系统的布尔描述）。安全对象不需要存储在系统中，甚至不加密形式。相反，该技术采用组合函数，当一个输入有效密码（其可以是用户持有的任何计算机可表示的信息）时，重新生成安全对象。每当输入有效的密码时，通过重新生成安全对象，就不需要存储安全对象。如果输入无效的密码，则该技术可能会生成不正确的对象，使得用户无法将此不正确对象与安全对象区分开。如果用户尝试使用不正确的对象，则用户可能会以未经授权的方式暴露，而无需用户知道他已被暴露。

3. 发明授权

US06928427B2 Efficient computational techniques for authorization control 有权
标题翻译：高效的授权控制技术
公开(公告)号：US06928427B2
公开(公告)日：2005-08-09
申请号：US10094509
申请日：2002-03-08
申请人： Sanguthevar Rajasekaran , Rajendra A. Gopalakrishna
发明人： Sanguthevar Rajasekaran , Rajendra A. Gopalakrishna
IPC分类号： G06F21/00 , H04L29/06 , G06F17/30
CPC分类号： H04L63/0807 , G06F21/6218 , Y10S707/99932 , Y10S707/99933 , Y10S707/99939 , Y10S707/99942 , Y10S707/99943
摘要： In an authorization system, access is defined by rules, roles and active rules. These definitions are preprocessed to form a bit array for each of a plurality of roles representing the rules that apply to that role. Once a bit array is calculated or generated for a given user based on that user's roles, the user bit array can be cached so that it need not be regenerated for each time the user requests access to resources. The rules used can either be role-based rules or active rules.
摘要翻译：在授权系统中，访问由规则，角色和活动规则定义。这些定义被预处理以形成代表适用于该角色的规则的多个角色中的每一个的位数组。一旦基于该用户的角色为给定用户计算或生成了一个位阵列，则可以缓存用户位阵列，以便每次用户请求访问资源时不需要重新生成位阵列。所使用的规则可以是基于角色的规则或活动规则。

4. 发明申请

US20090138944A1 METHOD AND APPARATUS FOR CAMOUFLAGING OF DATA, INFORMATION AND FUNCTIONAL TRANSFORMATIONS 有权
标题翻译：数据，信息和功能变换的方法和装置
公开(公告)号：US20090138944A1
公开(公告)日：2009-05-28
申请号：US12263938
申请日：2008-11-03
申请人： Sanguthevar Rajasekaran , Geoffrey R. Hird , Balas Natarajan Kausik
发明人： Sanguthevar Rajasekaran , Geoffrey R. Hird , Balas Natarajan Kausik
IPC分类号： H04L9/32
CPC分类号： G06F21/62 , H04L9/0869 , H04L9/3226 , H04L9/3247 , H04L2209/046 , H04L2209/20 , H04L2209/56
摘要： A computer-representable object (including, without limitation, a cryptographic key, or a graph or a Boolean description of a system) is secured using a generalized camouflaging technique. The secured object need not be stored in the system, not even in encrypted form. Instead, the technique employs a composition function that regenerates the secured object when one inputs a valid password (which may be any computer-representable information held by a user). By regenerating the secured object each time a valid password is entered, there is no need to store the secured object. If one inputs an invalid password, the technique may generate an incorrect object, such that the user is unable to distinguish this incorrect object from the secured object. If the user tries to use the incorrect object, the user can be exposed as unauthorized, without the user's knowledge that he has been exposed.
摘要翻译：使用广义伪装技术来确保计算机可表示的对象（包括但不限于密码密钥，或图形或系统的布尔描述）。安全对象不需要存储在系统中，甚至不加密形式。相反，该技术采用组合函数，当一个输入有效密码（其可以是用户持有的任何计算机可表示的信息）时，重新生成安全对象。每当输入有效的密码时，通过重新生成安全对象，就不需要存储安全对象。如果输入无效的密码，则该技术可能会生成不正确的对象，使得用户无法将此不正确对象与安全对象区分开。如果用户尝试使用不正确的对象，则用户可能会以未经授权的方式暴露，而无需用户知道他已被暴露。

5. 发明申请

US20090138706A1 TECHNIQUES FOR SEARCHING ENCRYPTED FILES 审中-公开
标题翻译：搜索加密文件的技术
公开(公告)号：US20090138706A1
公开(公告)日：2009-05-28
申请号：US12329629
申请日：2008-12-07
申请人： Sanguthevar Rajasekaran , Rammohan Varadarajan
发明人： Sanguthevar Rajasekaran , Rammohan Varadarajan
IPC分类号： H04L9/00 , G06F17/30
CPC分类号： G06F16/10 , G06F16/903 , Y10S707/99933
摘要： Techniques for efficiently searching encrypted searchable spaces. For example, embodiments of the present invention provide techniques for searching a plurality of files that are stored in encrypted (or ciphertext) form. According to embodiments of the present invention, the search can usually be performed by decrypting only a portion of the encrypted searchable space. According to an embodiment of the present invention, the search techniques determine a set of files comprising one or more files from the plurality of encrypted files that contain a user-specified query element. The set of files is usually determined by decrypting only a subset of the plurality of encrypted files.
摘要翻译：有效搜索加密可搜索空间的技术。例如，本发明的实施例提供了用于搜索以加密（或密文）形式存储的多个文件的技术。根据本发明的实施例，通常可以通过仅解密加密的可搜索空间的一部分来执行搜索。根据本发明的实施例，搜索技术确定包括来自包含用户指定的查询元素的多个加密文件中的一个或多个文件的一组文件。文件集通常通过仅解密多个加密文件的子集来确定。

6. 发明授权

US07484092B2 Techniques for searching encrypted files 有权
公开(公告)号：US07484092B2
公开(公告)日：2009-01-27
申请号：US10096086
申请日：2002-03-11
申请人： Sanguthevar Rajasekaran , Rammohan Varadarajan
发明人： Sanguthevar Rajasekaran , Rammohan Varadarajan
IPC分类号： H04L9/00 , G06F17/30
CPC分类号： G06F17/30964 , G06F17/30067 , Y10S707/99933
摘要： Techniques for efficiently searching encrypted searchable spaces. For example, embodiments of the present invention provide techniques for searching a plurality of files that are stored in encrypted (or ciphertext) form. According to embodiments of the present invention, the search can usually be performed by decrypting only a portion of the encrypted searchable space. According to an embodiment of the present invention, the search techniques determine a set of files comprising one or more files from the plurality of encrypted files that contain a user-specified query element. The set of files is usually determined by decrypting only a subset of the plurality of encrypted files.

7. 发明授权

US07111789B2 Enhancements to multi-party authentication and other protocols 有权
公开(公告)号：US07111789B2
公开(公告)日：2006-09-26
申请号：US10225935
申请日：2002-08-22
申请人： Sanguthevar Rajasekaran , James Reno , Rammohan Varadarajan , Sanjay Vyas , Do-Pil Park , Robert Jerdonek
发明人： Sanguthevar Rajasekaran , James Reno , Rammohan Varadarajan , Sanjay Vyas , Do-Pil Park , Robert Jerdonek
IPC分类号： G06K7/10
CPC分类号： G06Q20/02 , G06Q20/04 , G06Q20/12
摘要： Techniques are disclosed to increase the efficiency of multi-party authentication communications protocols. One technique includes a four party authentication method utilizing a general authenticator to store and provide a credit card authentication password and other payment information to an issuing bank and/or other parties involved in the transaction. Other techniques include the use of skeleton messages to minimize the forwarding of information through a forwarding party, the elimination of redundant communications exchanges, the use of a merchant appliance hardware solution to minimize system integration difficulties, and/or the imposition of credit card constraints. The techniques may be used singly or in combination.

8. 发明申请

US20050256890A1 Efficient searching techniques 有权
标题翻译：有效的搜索技术
公开(公告)号：US20050256890A1
公开(公告)日：2005-11-17
申请号：US11189185
申请日：2005-07-25
申请人： Sanguthevar Rajasekaran , Rajendra Gopalakrishna
发明人： Sanguthevar Rajasekaran , Rajendra Gopalakrishna
IPC分类号： G06F20060101 , G06F7/00 , G06F17/30
CPC分类号： G06F17/30327 , G06F17/30985 , Y10S707/99932 , Y10S707/99933 , Y10S707/99934 , Y10S707/99935 , Y10S707/99942 , Y10S707/99943 , Y10S707/99944 , Y10S707/99945
摘要： The present invention describes techniques for performing searches in an efficient manner while minimizing the memory resources required to perform the searches. According to the techniques of the present invention, the number of comparisons needed to determine if a query element is in included in a set of elements is proportional to the length of the query element and independent of the number of elements in the set of elements.
摘要翻译：本发明描述了在最小化执行搜索所需的存储器资源的同时以有效的方式执行搜索的技术。根据本发明的技术，确定查询元素是否包含在一组元素中所需的比较数量与查询元素的长度成正比，并且与元素集合中元素的数量无关。

9. 发明授权

US08429720B2 Method and apparatus for camouflaging of data, information and functional transformations 有权
公开(公告)号：US08429720B2
公开(公告)日：2013-04-23
申请号：US12263938
申请日：2008-11-03
申请人： Sanguthevar Rajasekaran , Geoffrey R. Hird , Balas Natarajan Kausik
发明人： Sanguthevar Rajasekaran , Geoffrey R. Hird , Balas Natarajan Kausik
IPC分类号： G06F7/04 , G06F15/16 , G06F17/30 , H04L29/06
CPC分类号： G06F21/62 , H04L9/0869 , H04L9/3226 , H04L9/3247 , H04L2209/046 , H04L2209/20 , H04L2209/56
摘要： A computer-representable object (including, without limitation, a cryptographic key, or a graph or a Boolean description of a system) is secured using a generalized camouflaging technique. The secured object need not be stored in the system, not even in encrypted form. Instead, the technique employs a composition function that regenerates the secured object when one inputs a valid password (which may be any computer-representable information held by a user). By regenerating the secured object each time a valid password is entered, there is no need to store the secured object. If one inputs an invalid password, the technique may generate an incorrect object, such that the user is unable to distinguish this incorrect object from the secured object. If the user tries to use the incorrect object, the user can be exposed as unauthorized, without the user's knowledge that he has been exposed.

10. 发明授权

US07167565B2 Efficient techniques for sharing a secret 有权
标题翻译：分享秘密的高效技术
公开(公告)号：US07167565B2
公开(公告)日：2007-01-23
申请号：US09853913
申请日：2001-05-11
申请人： Sanguthevar Rajasekaran
发明人： Sanguthevar Rajasekaran
IPC分类号： H04L9/30 , H04L9/14
CPC分类号： H04L9/085
摘要： An n person secret sharing solution computes n unique keys to be distributed to the secret owners along with an exponentiated version of the secret. The custodian performs an exponent/modulo operation each time one of the keys is received from one of the secret owners. Alternatively, n+1 keys are created by the custodian, and the custodian retains one key after distributing the remaining n keys to the secret owners. After the custodian has received and processed the n keys from the secret owners, he performs an exponent/modulo operation using his own retained key. According to another aspect, a k out of n secret sharing solution involves computing and storing a database having an entry for each unique combination of k keys that could be returned from among the n keys. After k keys have been received, the custodian looks up in the database the entry corresponding to the particular unique combination of secret owners who returned keys. The custodian performs another exponent/modulo operation using the entry retrieved from the database in order to reconstruct the original secret. According to an embodiment, the custodian computes n+1 keys, distributes n of the keys to the secret owners, and keeps one of the keys for himself. The custodian retrieves his own key and performs a final exponent/modulo operation in order to reconstruct the original secret. According to another aspect, a k out of n secret sharing solution involves encrypting the original secret before applying any conventional k out of n secret sharing solution.
摘要翻译：一个人的秘密共享解决方案计算出将被分配给秘密所有者的唯一密钥以及秘密的指数版本。每当从秘密所有者之一接收到一个密钥时，保管人执行指数/模运算。或者，保管人创建n + 1个密钥，保管人在将剩余的n个密钥分发给秘密所有者后，保留一个密钥。在保管人从秘密所有者接收并处理了n个密钥后，他使用自己保留的密钥执行指数/模运算。根据另一方面，n秘密共享解决方案涉及计算和存储具有可从n个密钥中返回的k个密钥的每个唯一组合的条目的数据库。在接收到k个密钥之后，保管人在数据库中查找与返回密钥的秘密所有者的特定唯一组合相对应的条目。保管人使用从数据库检索的条目执行另一指数/模运算，以重构原始秘密。根据实施例，保管人计算n + 1个密钥，将密钥的n个分配给秘密所有者，并且保留其中一个密钥。保管人检索自己的密钥并执行最后的指数/模运算，以重构原始秘密。根据另一方面，n秘密共享解决方案涉及在应用n个秘密共享解决方案中的任何常规k之前加密原始秘密。

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