Reduction of side-channel information by interacting crypto blocks

US8582756B2 · kind B2 · utility

Assignee

• IHP GMBH—INNOVATIONS FOR HIGH PERFORMANCE MICROELECTRONICS · DE

Inventors

• Steffen Peter · Frankfurt, DE
• Michael Methfessel · Frankfurt, DE
• Peter Langendorfer · Frankfurt, DE
• Frank Vater · Cottbus - Chóśebuz, DE

Key dates

• Filing date: Feb 8, 2008
• Grant date: Nov 12, 2013
• Expiry date: Oct 11, 2029

Classification

• Technology area (CPC —): General

Abstract

A cryptography device which reduces side channel information including a first computing block adapted to either encrypt or decrypt received first input data and to output the encrypted or decrypted first input data as first output data at a first data output, a second computing block adapted to either encrypt or decrypt received second input data and to output the encrypted or decrypted second input data as second output data at a second data output, and a control unit connected to the first and second computing blocks and adapted in a first operating condition on the one hand to partially or completely assign the first output data to the first computing block as the first input data and on the other hand to completely or partially assign the first output data to the second computing block as part of the second input data.