Selective encryption with coverage encryption
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United States of America Patent
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Aug 26, 2014
Grant Date -
Sep 1, 2005
app pub date -
Apr 1, 2005
filing date -
Sep 9, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for enabling use of multiple digital rights management scenarios (DRM). Unencrypted data representing digital content is examined to identify at least segments of content for DRM encryption. The identified segments of content are duplicated and then encrypted using a first encryption method associated with a first DRM to produce first encrypted segments. Duplicates are encrypted using a second encryption method associated with a second DRM to produce second encrypted segments. At least a portion of segments not selected for DRM encryption are encrypted using a coverage encryption method. The coverage encryption key is encrypted by each of a third and fourth encryption methods associated with the first and second DRMs respectively. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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