Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2002-02-28
2008-11-25
Barron, Jr., Gilberto (Department: 2132)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C380S227000, C725S025000, C726S026000, C726S027000
Reexamination Certificate
active
07457967
ABSTRACT:
One or more embodiments of the invention provide a method, apparatus, and article of manufacture for limiting unauthorized access to digital services. A hidden non-modifiable identification number is embedded into a nonvolatile memory component. The nonvolatile memory component is used to contain state information to provide desired functionality and enforce one or more security policies for accessing the digital services. Also, the hidden number uniquely identifies a device containing the nonvolatile memory component and access to the digital services is based on access rights associated with the hidden number. Once embedded, access to the nonvolatile memory component is isolated such that access to the identification number is limited to a fixed state custom logic block, the nonvolatile memory component is protected from modification such that it is read only, and the nonvolatile memory component is not directly accessible via a system bus.
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Cocchi Ronald P.
Curren Christopher P.
Kahn Raynold M.
Barron Jr. Gilberto
Dinh Minh
The DIRECTV Group Inc.
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