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Method and apparatus for generating random numbers
 
   
Document Number
US Patent 7571199
Issued Date
August 4, 2009
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Abstract
A system collects entropy data and stores the entropy data in a nonvolatile memory. The entropy data stored in the nonvolatile memory is updated with newly collected entropy data. The entropy data stored in the nonvolatile memory is used to generate a string of random bits. The entropy data is collected from multiple sources within a computer system and may include data related to a processor in the computer system and an operating system executing on the computer system. The entropy data is maintained in a protected portion of an operating system kernel. A hashing algorithm is applied to the entropy data to generate random seed data.
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Number of Claims:
17
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Owner
Microsoft Corporation (Redmond, WA)
Published
August 4, 2009
Application Number
09/714,781
Filed
November 15, 2000
US Classification
708/250  
Int'l Classification
G06F   7/58   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
708/254   708/250  
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