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:
Jul. 01, 1997
Filed:
Dec. 30, 1994
Alberto J Fernandez, Miami, FL (US);
XTec, Incorporated, Miami, FL (US);
Abstract
A method and apparatus for securing data stored in semiconductor memory cells of a semiconductor device is described. A reference fingerprint corresponding to numerical representations of a measurement of the levels of charges trapped in the memory cells is generated and stored. The measurement is performed immediately after programming data to the memory cells. The reference fingerprint is then compared to a measurement of numerical representations of the levels of charges trapped in the memory cells of a memory device that has been presented to a reader. If a match occurs, then the data stored in the memory device is authenticated. An intentional offset error voltage may be applied when writing data to the memory cells to enhance the security of the data. The reference fingerprint may also be encrypted prior to storage for added security. Lastly, fuzzy logic techniques may be used to compensate for environmental and hardware related fluctuations in the levels of trapped charges of the programmed memory cells.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile