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公开(公告)号：US08634552B2
公开(公告)日：2014-01-21
申请号：US12576784
申请日：2009-10-09
申请人： David F. Pare , David L. Biderman , Stephen Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
发明人： David F. Pare , David L. Biderman , Stephen Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
CPC分类号： H04L65/602 , H04L9/0637 , H04L9/065 , H04L9/08 , H04L9/0844 , H04L9/12 , H04L67/2842 , H04L67/32
摘要： An initialization vector (IV) is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining (CBC) encryption, without requiring decryption of previous blocks within the stream. For example, a listener who accesses a distribution point to retrieve encrypted content authenticates himself to an application server that regulates access to encrypted content on the distribution point, and responsively receives a key. The listener then requests access to a reference point within the encrypted content stream somewhere after its beginning (e.g., using preview clips). The distribution point relates the reference point to a corresponding block of the encrypted stream, and identifies an IV previously used for encryption of that block. The distribution point provides the associated encrypted block of content and the IV to the listener to enable mid-stream rendering of the encrypted content, without requiring the listener to decrypt previous blocks within the encrypted stream.
摘要翻译： 使用初始化向量（IV）来解密已经使用Cypher块链接（CBC）加密加密的流的块，而不需要解析流内的先前块。 例如，访问分发点以检索加密内容的监听者向调配对分发点上的加密内容的访问的应用服务器认证自身，并且响应地接收密钥。 然后，收听者在其开始之后的某处（例如，使用预览剪辑）请求访问加密内容流中的参考点。 分配点将参考点与加密流的相应块相关联，并且识别先前用于该块的加密的IV。 分发点向收听者提供相关的加密内容块和IV，以允许加密内容的中间流呈现，而不需要收听者解密加密流中的先前块。
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公开(公告)号：US20100091985A1
公开(公告)日：2010-04-15
申请号：US12576784
申请日：2009-10-09
申请人： David F. Pare , David L. Biderman , Stephen Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
发明人： David F. Pare , David L. Biderman , Stephen Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
IPC分类号： H04L9/18
CPC分类号： H04L65/602 , H04L9/0637 , H04L9/065 , H04L9/08 , H04L9/0844 , H04L9/12 , H04L67/2842 , H04L67/32
摘要： An initialization vector (IV) is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining (CBC) encryption, without requiring decryption of previous blocks within the stream. For example, a listener who accesses a distribution point to retrieve encrypted content authenticates himself to an application server that regulates access to encrypted content on the distribution point, and responsively receives a key. The listener then requests access to a reference point within the encrypted content stream somewhere after its beginning (e.g., using preview clips). The distribution point relates the reference point to a corresponding block of the encrypted stream, and identifies an IV previously used for encryption of that block. The distribution point provides the associated encrypted block of content and the IV to the listener to enable mid-stream rendering of the encrypted content, without requiring the listener to decrypt previous blocks within the encrypted stream.
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公开(公告)号：US08284931B2
公开(公告)日：2012-10-09
申请号：US12786129
申请日：2010-05-24
申请人： David F. Pare , David L. Biderman , Stephen E. Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
发明人： David F. Pare , David L. Biderman , Stephen E. Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
CPC分类号： H04L65/602 , H04L9/0637 , H04L9/065 , H04L9/08 , H04L9/0844 , H04L9/12 , H04L67/2842 , H04L67/32
摘要： An initialization vector (IV) is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining (CBC) encryption, without requiring decryption of previous blocks within the stream. For example, a listener who accesses a distribution point to retrieve encrypted content authenticates himself to an application server that regulates access to encrypted content on the distribution point, and responsively receives a key. The listener then requests access to a reference point within the encrypted content stream somewhere after its beginning (e.g., using preview clips). The distribution point relates the reference point to a corresponding block of the encrypted stream, and identifies an IV previously used for encryption of that block. The distribution point provides the associated encrypted block of content and the IV to the listener to enable mid-stream rendering of the encrypted content, without requiring the listener to decrypt previous blocks within the encrypted stream.
摘要翻译： 使用初始化向量（IV）来解密已经使用Cypher块链接（CBC）加密加密的流的块，而不需要解析流内的先前块。 例如，访问分发点以检索加密内容的监听者向调配对分发点上的加密内容的访问的应用服务器认证自身，并且响应地接收密钥。 然后，收听者在其开始之后的某处（例如，使用预览剪辑）请求访问加密内容流中的参考点。 分配点将参考点与加密流的相应块相关联，并且识别先前用于该块的加密的IV。 分发点向收听者提供相关的加密内容块和IV，以允许加密内容的中间流呈现，而不需要收听者解密加密流中的先前块。
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公开(公告)号：US07734042B2
公开(公告)日：2010-06-08
申请号：US11019110
申请日：2004-12-22
申请人： David F. Pare , David L. Biderman , Stephen E. Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
发明人： David F. Pare , David L. Biderman , Stephen E. Loomis , Scott K. Brown , Michael Wise , David Wexelblat , Conor P. Cahill , David S. Bill
CPC分类号： H04L65/602 , H04L9/0637 , H04L9/065 , H04L9/08 , H04L9/0844 , H04L9/12 , H04L67/2842 , H04L67/32
摘要： An initialization vector (IV) is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining (CBC) encryption, without requiring decryption of previous blocks within the stream. For example, a listener who accesses a distribution point to retrieve encrypted content authenticates himself to an application server that regulates access to encrypted content on the distribution point, and responsively receives a key. The listener then requests access to a reference point within the encrypted content stream somewhere after its beginning (e.g., using preview clips). The distribution point relates the reference point to a corresponding block of the encrypted stream, and identifies an IV previously used for encryption of that block. The distribution point provides the associated encrypted block of content and the IV to the listener to enable mid-stream rendering of the encrypted content, without requiring the listener to decrypt previous blocks within the encrypted stream.
摘要翻译： 使用初始化向量（IV）来解密已经使用Cypher块链接（CBC）加密加密的流的块，而不需要解析流内的先前块。 例如，访问分发点以检索加密内容的监听者向调配对分发点上的加密内容的访问的应用服务器认证自身，并且响应地接收密钥。 然后，收听者在其开始之后的某处（例如，使用预览剪辑）请求访问加密内容流中的参考点。 分配点将参考点与加密流的相应块相关联，并且识别先前用于该块的加密的IV。 分发点向收听者提供相关的加密内容块和IV，以允许加密内容的中间流呈现，而不需要收听者解密加密流中的先前块。
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