Cryptography – Video cryptography
Reexamination Certificate
2006-10-10
2006-10-10
Song, Hosuk (Department: 2135)
Cryptography
Video cryptography
C380S281000, C380S284000, C380S201000, C380S217000, C725S031000
Reexamination Certificate
active
07120250
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 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. A set of pointers are generated that point to the first and second encrypted segments content. A file is then created containing first and second encrypted segments of content, pointers and unencrypted content along with DRM rights data to produce a selectively encrypted multiple DRM enabled file.
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paten
Miller Jerry A.
Miller Patent Services
Song Hosuk
Sony Corporation
Sony Electronics Inc.
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