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31. 发明授权

US08635442B2 System and method for long-term digital signature verification utilizing light weight digital signatures 有权
标题翻译：使用轻量级数字签名进行长期数字签名验证的系统和方法
公开(公告)号：US08635442B2
公开(公告)日：2014-01-21
申请号：US12431608
申请日：2009-04-28
申请人： Sunil C. Agrawal
发明人： Sunil C. Agrawal
IPC分类号： H04L9/00
CPC分类号： H04L9/3268
摘要： Various embodiments of a system and method for long-term digital signature verification utilizing light weight digital signatures are described. Embodiments may include a verifying entity system that receives digitally signed data including a portion of data, signing time, and digital signature. The verifying entity system may receive a digital certificate that includes information for verifying the digital signature and an expiration time for the certificate. The verifying entity system may receive CRL that persists revocation information corresponding to ones of the revoked digital certificates that have already expired. The verifying entity system may utilize the CRL to determine that the digital signature is valid subsequent to its expiration time. The verifying entity system may evaluate the CRL to determine that the digital certificate was not revoked at the signing time. The verifying entity system may determine the digital signature is a valid digital signature and generate a corresponding result.
摘要翻译：描述了使用轻量级数字签名的长期数字签名验证的系统和方法的各种实施例。实施例可以包括验证实体系统，其接收包括数据的一部分，签名时间和数字签名的数字签名的数据。验证实体系统可以接收包括用于验证数字签名的信息和证书的到期时间的数字证书。验证实体系统可以接收持续与已经过期的撤销数字证书中的那些相应的撤销信息的CRL。验证实体系统可以利用CRL在其到期时间之后确定数字签名是有效的。验证实体系统可以评估CRL以确定数字证书在签名时没有被撤销。验证实体系统可以确定数字签名是有效的数字签名并产生相应的结果。

32. 发明申请

US20130166909A1 Client-Side Player File and Content License Verification 有权
标题翻译：客户端播放器文件和内容许可证验证
公开(公告)号：US20130166909A1
公开(公告)日：2013-06-27
申请号：US12876091
申请日：2010-09-03
申请人： Sunil C. Agrawal , Roderick David Schultz
发明人： Sunil C. Agrawal , Roderick David Schultz
IPC分类号： H04L9/32
CPC分类号： G06F21/10 , G06F21/64 , H04L63/123
摘要： Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for verifying a message based on application of a hashing algorithm. In one aspect, a method includes obtaining a license, from a remote server, for a content item to be presented using a player file executed by a multimedia player on a computing device. The license includes an encryption key and an authorization to present the content item using one or more authorized player files. A particular player file is received for use in presenting the content item, and a determination is made whether the particular player file is authorized for use in presenting the content item based on the authorization. The content item is decrypted using the encryption key, and the content item is presented using the particular player file in accordance with the determination.
摘要翻译：方法，系统和装置，包括在计算机存储介质上编码的计算机程序，用于基于哈希算法的应用来验证消息。一方面，一种方法包括从远程服务器获得使用计算设备上的多媒体播放器执行的播放器文件来呈现的内容项目的许可证。许可证包括加密密钥和授权使用一个或多个授权的播放器文件呈现内容项目。接收特定播放器文件以用于呈现内容项目，并且确定特定播放器文件是否被授权用于基于授权呈现内容项目。使用加密密钥对内容项目进行解密，并且根据该确定使用特定的播放器文件呈现内容项目。

33. 发明申请

US20130125223A1 System And Method For Transparently Authenticating A User To A Digital Rights Management Entity 有权
标题翻译：将用户透明地认证给数字版权管理实体的系统和方法
公开(公告)号：US20130125223A1
公开(公告)日：2013-05-16
申请号：US12550265
申请日：2009-08-28
申请人： Peter Sorotokin , James L. Lester , Sunil C. Agrawal , Andrei Sheretov
发明人： Peter Sorotokin , James L. Lester , Sunil C. Agrawal , Andrei Sheretov
IPC分类号： H04L9/32
CPC分类号： H04L9/3213 , H04L63/0807 , H04L2209/603 , H04L2463/101
摘要： Various embodiments of a system and method for transparently authenticating a user to a digital rights management entity are described. In various embodiments, a digital rights management server may be configured to receive an authentication token from a first remote computer system. Such authentication token may indicate that a particular user of the first remote computer system was authenticated by a first content provider of one or more content providers. In various embodiments, the digital rights management server may also be configured to verify the authentication token by determining that one or more portions of the authentication token were generated based on respective authentication information issued to the first content provider. In various embodiments, the digital rights management server may also be configured to, in response to verification of the authentication token, issue to the first remote computer system one or more credentials.
摘要翻译：描述用于将用户透明地认证给数字版权管理实体的系统和方法的各种实施例。在各种实施例中，数字版权管理服务器可以被配置为从第一远程计算机系统接收认证令牌。这种认证令牌可以指示第一远程计算机系统的特定用户被一个或多个内容提供商的第一内容提供商认证。在各种实施例中，数字版权管理服务器还可以被配置为基于发布给第一内容提供商的相应认证信息来确定认证令牌的一个或多个部分来生成认证令牌。在各种实施例中，数字版权管理服务器还可以被配置为响应于认证令牌的验证向第一远程计算机系统发出一个或多个证书。

34. 发明申请

US20130124869A1 Using Digital Certificates in Document Distribution 有权
标题翻译：在文件分发中使用数字证书
公开(公告)号：US20130124869A1
公开(公告)日：2013-05-16
申请号：US13229463
申请日：2011-09-09
申请人： Sujata Das , Sunil C. Agrawal , Charles R. Meyers, IV
发明人： Sujata Das , Sunil C. Agrawal , Charles R. Meyers, IV
IPC分类号： H04L9/32
CPC分类号： G06F21/10
摘要： One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if teens of a license agreement associated with the digital certificate are violated.
摘要翻译：本发明的一个实施例提供一种使用数字证书来促进对操纵文档的应用程序执行许可条款的系统。在操作期间，系统获得证书，其中凭证包括私钥和包含相应公钥的数字证书。该数字证书还包含一个配置文件，指定允许的操作，这些操作可以在凭证上签名的文档上执行。接下来，系统使用凭证对文档进行数字签名，以便所得到的签名文档用私钥签名，并且包括具有指定允许操作的简档的数字证书的副本。如果违反与数字证书相关的许可协议的条款，证书颁发者可随后撤销数字证书（有效地撤销许可证）。

35. 发明申请

US20130124862A1 System And Method For Digital Rights Management With Secure Application-Content Binding 有权
标题翻译：使用安全的应用内容绑定进行数字版权管理的系统和方法
公开(公告)号：US20130124862A1
公开(公告)日：2013-05-16
申请号：US12475325
申请日：2009-05-29
申请人： Florian Pestoni , Sunil C. Agrawal , Pritham Shetty
发明人： Florian Pestoni , Sunil C. Agrawal , Pritham Shetty
IPC分类号： H04L9/32 , H04L9/14 , G06F21/24 , H04L9/08 , G06F9/455
CPC分类号： H04L9/0825 , G06F9/455 , G06F21/10 , G06F21/121 , H04L2209/603
摘要： Various embodiments of a system and method for digital rights management with secure application-content binding are described. Various embodiments may include a system configured to decrypt an encrypted application key with a private key. The system may also be configured to decrypt an encrypted application including a binding key with the decrypted application key. The system may also be configured to decrypt an encrypted content key with the binding key from the decrypted application. The system may be further configured to decrypt encrypted content with the decrypted content key. In various embodiments, the system may also be configured to consume the decrypted content with the decrypted application.
摘要翻译：描述了具有安全的应用内容绑定的用于数字权限管理的系统和方法的各种实施例。各种实施例可以包括被配置为用私钥对加密的应用密钥进行解密的系统。系统还可以被配置为使用解密的应用密钥对包括绑定密钥的加密应用进行解密。该系统还可以被配置为使用来自解密应用的绑定密钥来解密加密的内容密钥。该系统还可以被配置为利用解密的内容密钥来解密加密的内容。在各种实施例中，系统还可以被配置为使用解密的应用来消费解密的内容。

36. 发明申请

US20130121489A1 System And Method For Providing Content Protection Of Linearly Consumed Content With A Bidirectional Protocol For License Acquisition 有权
标题翻译：使用用于许可证获取的双向协议提供线性消费内容的内容保护的系统和方法
公开(公告)号：US20130121489A1
公开(公告)日：2013-05-16
申请号：US12790529
申请日：2010-05-28
申请人： Florian Pestoni , Sunil C. Agrawal , Viswanathan Swaminathan
发明人： Florian Pestoni , Sunil C. Agrawal , Viswanathan Swaminathan
IPC分类号： H04N7/167 , H04L9/08 , H04L29/06
CPC分类号： H04L9/0822 , H04L63/06 , H04L63/10 , H04L2209/603 , H04L2463/101 , H04N21/2347 , H04N21/4627 , H04N21/8355 , H04N21/8456
摘要： Embodiments may include a content provider system configured to provide electronic content that includes multiple encrypted content items to a playback device. A playback device may be configured to acquire root licenses and/or content licenses from a license server; such licenses may cryptographically protect the content items that a playback device receives from a content provider system. In various embodiments, the electronic content may be content that is to be linearly consumed, such as a channel within a broadcast environment. In various embodiments, the playback device may explicitly request a license for one or more of the content items that it receives; such request may be issued to a license server. The license server may evaluate the request and respond to the playback device with the license for a content item. In various embodiments, the playback device may utilize the received license to decrypt and consume the respective content item.
摘要翻译：实施例可以包括被配置为向回放设备提供包括多个加密内容项的电子内容的内容提供者系统。回放设备可以被配置为从许可证服务器获取根许可证和/或内容许可证; 这样的许可证可以密码地保护播放设备从内容提供商系统接收的内容项目。在各种实施例中，电子内容可以是线性消费的内容，诸如广播环境中的频道。在各种实施例中，播放设备可以明确地请求其接收的一个或多个内容项目的许可证; 这样的请求可以被发布到许可证服务器。许可证服务器可以评估请求并且对具有内容项目的许可证的播放设备进行响应。在各种实施例中，回放设备可以利用所接收的许可证来解密并消费相应的内容项目。

37. 发明申请

US20120324232A1 Author Signatures for Legal Purposes 有权
标题翻译：作者签名为法定目的
公开(公告)号：US20120324232A1
公开(公告)日：2012-12-20
申请号：US13594666
申请日：2012-08-24
申请人： James D. Pravetz , Krish Chaudhury , Sunil C. Agrawal
发明人： James D. Pravetz , Krish Chaudhury , Sunil C. Agrawal
IPC分类号： H04L9/32 , H04L9/00
CPC分类号： G06F21/64
摘要： Methods and apparatus, including computer program products, implementing and using techniques for establishing trust in an electronic document. An electronic document is received. State dependent content in the electronic document is identified. The state dependent content is content that is renderable to have a several appearances. The electronic document is presented to a user, which includes disclosing the presence of any identified state dependent content in the electronic document.
摘要翻译：方法和设备，包括计算机程序产品，在电子文档中建立信任的实施和使用技术。收到电子文件。确定电子文件中的国家相关内容。状态依赖内容是可呈现多个外观的内容。电子文档被呈现给用户，其包括在电子文档中公开任何已识别的状态依赖内容的存在。

38. 发明授权

US08275993B2 Author signatures for legal purposes 有权
标题翻译：作者签名用于法律目的
公开(公告)号：US08275993B2
公开(公告)日：2012-09-25
申请号：US12848845
申请日：2010-08-02
申请人： James D. Pravetz , Krish Chaudhury , Sunil C. Agrawal
发明人： James D. Pravetz , Krish Chaudhury , Sunil C. Agrawal
IPC分类号： H04L9/00
CPC分类号： G06F21/64
摘要： Methods and apparatus, including computer program products, implementing and using techniques for establishing trust in an electronic document. An electronic document is received. State dependent content in the electronic document is identified. The state dependent content is content that is renderable to have a several appearances. The electronic document is presented to a user, which includes disclosing the presence of any identified state dependent content in the electronic document.
摘要翻译：方法和设备，包括计算机程序产品，在电子文档中建立信任的实施和使用技术。收到电子文件。确定电子文件中的国家相关内容。状态依赖内容是可呈现多个外观的内容。电子文档被呈现给用户，其包括在电子文档中公开任何已识别的状态依赖内容的存在。

39. 发明授权

US08219805B1 Application identification 有权
标题翻译：申请鉴定
公开(公告)号：US08219805B1
公开(公告)日：2012-07-10
申请号：US12001497
申请日：2007-12-11
申请人： William Ie , Sunil C. Agrawal
发明人： William Ie , Sunil C. Agrawal
IPC分类号： H04L29/06
CPC分类号： H04L9/3265 , G06F21/44
摘要： Methods, systems, and apparatus, including medium-encoded computer program products, for identifying applications. In general, in one aspect, a method includes: obtaining a first certificate chain from certificates corresponding to a digitally signed application, and a second certificate chain from a successful validation of the digital signature using the certificates; and generating an identifier for the application based on one or more certificate owner names found in both the first certificate chain and the second certificate chain. Generating the identifier for the application can include finding a location in one of the first and second certificate chains that corresponds to a root of the other of the first and second certificate chains, and comparing the one or more certificate owner names found in both the first certificate chain and the second certificate chain, starting or ending with the root and the location.
摘要翻译：用于识别应用的方法，系统和装置，包括中等编码的计算机程序产品。通常，一方面，一种方法包括：从使用证书的数字签名的成功验证获得与数字签名的应用相对应的证书的第一证书链和第二证书链; 以及基于在所述第一证书链和所述第二证书链中找到的一个或多个证书所有者名称来生成所述应用的标识符。生成应用程序的标识符可以包括在第一和第二证书链之一中找到与第一和第二证书链中的另一个的根对应的位置，并且比较在第一和第二证书链中找到的一个或多个证书所有者名称证书链和第二个证书链，以根和位置开始或结束。

40. 发明授权

US08099594B1 Certificate processing 有权
标题翻译：证书处理
公开(公告)号：US08099594B1
公开(公告)日：2012-01-17
申请号：US12903070
申请日：2010-10-12
申请人： Andrei Sheretov , Sunil C. Agrawal
发明人： Andrei Sheretov , Sunil C. Agrawal
IPC分类号： H04L9/32
CPC分类号： H04L63/0823 , G06F21/33 , G06F2221/2145
摘要： Embodiments of methods, apparatuses, systems and/or devices for processing a certificate are disclosed.
摘要翻译：公开了用于处理证书的方法，设备，系统和/或设备的实施例。

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