Side channel attack protection

US11106830B2 · kind B2 · utility

Assignee

• NXP USA, Inc. · US

Inventors

• Stefan Doll · Obermoschel, DE
• Sandeep Jain · Milpitas, US
• Vivek Sharma · Tokyo, JP
• Dhruv Satsangi · Agra, IN
• Arnavesh Varun Giri · Ranchi, IN
• Ankur Krishna · Noida, IN
• Nitin Moudgil · Banga, IN

Key dates

• Filing date: Dec 7, 2018
• Grant date: Aug 31, 2021
• Expiry date: May 4, 2039

Classification

• Technology area (CPC —): General

Abstract

A system for securing a secret word during a read of the secret word from a read-only memory (ROM) is disclosed. The system includes a memory controller coupled to the ROM and a random number generator coupled to the memory controller. The random number generator is configured to generate a random number. The system further includes a number shuffler coupled to the random number generator and the memory controller. The number shuffler is configured to generate a bit read order based on the random number and the memory controller is configured to read bits of the secret word from the ROM according to the bit read order.