Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2007-04-24
2007-04-24
Abdi, Kambiz (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C705S001100, C705S050000, C705S052000, C705S054000, C705S057000, C726S002000, C726S021000, C726S027000, C726S031000, C726S032000, C726S033000, C380S247000, C707S793000, C713S155000, C713S168000, C713S182000
Reexamination Certificate
active
11088936
ABSTRACT:
A trusted system having at least one repository for controlling use of digital works in accordance with usage rights associated with the digital works. The system comprises means for receiving a request to access a digital work in accordance with usage rights associated with the digital work, the usage rights specifying a manner of access and indicating a security class, means for determining a security level of a repository controlling the requested access, and means for granting the request and permitting exercise of the manner of access specified in the usage rights associated with the digital work in accordance with the usage rights if the security level of the repository corresponds to the security class specified in the usage rights associated with the digital work. The security class indicates a security level of a repository that can access the digital work, and the usage rights are expressed with a grammar. In addition, an authorization object is used for identification of the repository, the physical integrity of the repository is secured, and digital works are accessed only through a transmission transaction protocol.
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Pirolli Peter L. T.
Stefik Mark J.
Abdi Kambiz
ContentGuard Holdings Inc.
Kaufman Marc S.
Nixon & Peabody LLP
Villamar Carlos R.
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