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:
Apr. 21, 2015
Filed:
Jan. 16, 2013
Qualcomm Incorporated, San Diego, CA (US);
Xu Guo, San Diego, CA (US);
Liangguo Shen, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
One feature pertains to a method that includes implementing a Physical Unclonable Function (PUF) circuit, and obtaining a first set of output bits from the PUF circuit by operating the PUF circuit at a first supply voltage level and/or first frequency. Then, at least one of the first supply voltage level is changed to a second supply voltage level and/or the first frequency is changed to a second frequency, where the second supply voltage level and the second frequency are different than the first supply voltage level and the first frequency, respectively. A second set of output bits is then obtained by operating the PUF circuit at the second supply voltage level and/or the second frequency, where the second set of output bits is in part different than the first set. Secure data is generated using the first set of output bits and the second sets of output bits.