The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2011
Filed:
Mar. 31, 2006
Maik Mueller, St. Leon-Rot, DE;
Michael Freidrich, Mannheim, DE;
Klaus Kiefer, Heidelberg, DE;
Ralf Miko, Wailduern, DE;
Juergen Schneider, Ludwigshafen, DE;
Maik Mueller, St. Leon-Rot, DE;
Michael Freidrich, Mannheim, DE;
Klaus Kiefer, Heidelberg, DE;
Ralf Miko, Wailduern, DE;
Juergen Schneider, Ludwigshafen, DE;
SAP AG, Walldorf, DE;
Abstract
A process and system for generating a pseudo-random number is presented. Input data having entropy is gathered in an Entropy Pool and transformed once by a cryptographic hash function. The transformed data forms the internal state of the pseudo-random number generator. The generator forms the output by applying a second cryptographic hash function to this internal state. Finally, the generator updates the internal state by inputting the current internal state and data from the Entropy Pool into a third cryptographic hash function. The output of the third hash function forms the new internal state of the pseudo-random number generator.