Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2007-08-21
2007-08-21
Zand, Kambiz (Department: 2134)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C705S018000, C713S187000, C714S763000, C714S764000, C714S765000, C714S766000, C714S767000, C726S026000, C380S200000, C380S201000, C380S202000
Reexamination Certificate
active
10120865
ABSTRACT:
A method for hardening an extensible firmware framework and system in which the framework is implemented. In accordance with the method, a resource access policy that defines rules to allow or disallow access to designated system resources, such as memory and I/O, is defined. During execution of firmware-based event handlers, event handler code may seek to access a designated system resource. In response thereto, access to the system resource may be determined based on a security status of a firmware-based event handler in consideration of any applicable rules defined by the resource access policy. For example, a resource access policy may allow only secure event handlers to access selected portions of memory, while preventing non-secure event handlers from accessing the same. In this manner, errant and malicious event handlers are prevented from damaging critical resources.
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Blakely , Sokoloff, Taylor & Zafman LLP
Intel Corporation
Tolentino Roderick
Zand Kambiz
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