发明名称 |
METHOD AND APPARATUS FOR NETWORKED INFORMATION DISSEMINATION THROUGH SECURE TRANSCODING |
摘要 |
<p>A method and system enables network intermediaries such as proxies to transcode multimedia data without violating end-to-end security guarantees. In one embodiment, a content provider decomposes a data stream into a plurality of components, each of which are independently encrypted. In a preferred embodiment, an intermediary or proxy performs transcoding of the components by prioritizing and dropping predetermined components, in accordance with unencrypted clear-text metadata associated with each component, without the need for decrypting the components. Clear-text metadata preferably provides a semantic understanding of the absolute or relative importance/priority of the components with respect to each other, thereby facilitating the transcoding process. The destination/client device can subsequently decrypt the components transmitted by the transcoding proxy and reassemble them into a representation of the original data content.</p> |
申请公布号 |
EP1320973(B1) |
申请公布日期 |
2005.03.16 |
申请号 |
EP20010969934 |
申请日期 |
2001.09.19 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
CHANG, YUAN-CHI;LI, CHUNG-SHENG;HAN, RICHARD,YEH-WHEI;SMITH, JOHN |
分类号 |
G06F13/00;G06F21/24;H04L29/06;H04N7/167;H04N7/26;H04N21/222;H04N21/2343;H04N21/2347;H04N21/235;H04N21/84;(IPC1-7):H04L29/06 |
主分类号 |
G06F13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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