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:
Oct. 12, 2010
Filed:
Sep. 13, 2006
Matthew J. Campagna, Ridgefield, CT (US);
Yiqun Yin, Riverside, CT (US);
Matthew J. Campagna, Ridgefield, CT (US);
Yiqun Yin, Riverside, CT (US);
Pitney Bowes Inc., Stamford, CT (US);
Abstract
A method and deterministic random bit generator system operating in accordance with the method, for generating cryptographic keys and similar secret cryptographic inputs which are hard to guess. A entropy is input from an entropy source; and an initial seed is generated as a function of the entropy input. When a request to generate a cryptographic key is received a temporary seed is generated by applying the function to the seed. The requested cryptographic key is generated by applying a second function to the temporary seed; and output. A new seed is then generated by applying a third function to the temporary seed. In one embodiment of the subject invention all three functions are carried out by applying the same operator to appropriate inputs. In another embodiment of the subject invention new entropy is incorporated into the seed from time to time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile