Patent · US Active

Cryptographic processor, method for implementing a cryptographic processor and key generation circuit

US9806881B2 · kind B2 · utility

2Cited by

3References

24Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Thomas Kuenemund · Munich, DE
Berndt Gammel · Borgo San Lazzaro, DE
Franz Klug · Munich, DE

Key dates

Filing date	Jun 27, 2014
Grant date	Oct 31, 2017
Priority date	—
Expiry date	Jun 27, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/046
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A cryptographic processor is described comprising a processing circuit configured to perform a round function of an iterated cryptographic algorithm, a controller configured to control the processing circuit to apply a plurality of iterations of the round function on a message to process the message in accordance with the iterated cryptographic algorithm and a transformation circuit configured to transform the input of a second iteration of the round function following a first iteration of the round function of the plurality of iterations and to supply the transformed input as input to the second iteration wherein the transformation circuit is implemented using a circuit camouflage technique.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.