Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2011-01-11
2011-01-11
Augustin, Evens J (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C380S232000
Reexamination Certificate
active
07870076
ABSTRACT:
Some embodiments of a method and an apparatus to provide interoperability between different digital content protection schemes have been presented. In one embodiment, a first copy of digital content encrypted using a first protection scheme is received from a user. In response to a request from the user, it is verified that the user is a rightful owner of the first copy without decrypting the first copy. A second copy of the digital content encrypted using a second protection scheme is sent to the user if the user is a rightful owner of the first copy.
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Augustin Evens J
Blakely , Sokoloff, Taylor & Zafman LLP
Cheung Calvin K
Red Hat, Inc.
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