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. 05, 2019
Filed:
Apr. 20, 2017
Seagate Technology, Llc, Cupertino, CA (US);
Bruce D. Buch, Westborough, MA (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
Apparatus and method for enacting data security in a data storage device, such as by protecting against a differential power analysis (DPA) attack. In some embodiments, a dithered clock signal is generated having a succession of clock pulse segments. Each of the clock pulse segments has a different respective frequency selected in response to a first random number and a different overall duration selected in response to a second random number. The different segment frequencies are selected by supplying the first random number to a lookup table, and the different segment durations are obtained by initializing a timer circuit using the second random number. The dithered clock signal is used to clock a programmable processor during execution of a cryptographic function.