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:
Nov. 05, 2013
Filed:
Jul. 07, 2004
Daisuke Suzuki, Tokyo, JP;
Minoru Saeki, Tokyo, JP;
Daisuke Suzuki, Tokyo, JP;
Minoru Saeki, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An electronic device that defends against an attack trying to identify confidential information from power consumption is provided without any circuit that performs a complementary operation to eliminate bias in power consumption. An elementary device Ais formed by a plurality of transistors-. The elementary device Areceives inputs signals x, x, a random number r, and a control signal en, and outputs z. The output z is obtained by XORing (x^r)&(x^r) with the random number r. After the state transitions of the input signal, x, x, and the random number r, are settled, the control signal en is used to output z. This makes the signal transition rate of the output z equal, thereby defending against an attack trying to identify confidential information from power consumption.