Method and system for constant time cryptography using a co-processor

US10243727B2 · kind B2 · utility

Assignees

• ATI Technologies ULC · CA
• Advanced Micro Devices, Inc. · US

Inventors

• Winthrop John Wu · Shrewsbury, US
• James R. Goodman · Madison, US
• Martin Kiernicki · Acton, US
• Yoichi Shimokawa · Shrewsbury, US
• William T. Morrison · Sunnyvale, US
• Creighton Eldridge · Cambridge, US
• David A. Kaplan · Austin, US

Key dates

• Filing date: Oct 31, 2014
• Grant date: Mar 26, 2019
• Expiry date: Feb 21, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2209/08
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

The present disclosure presents methods, apparatuses, and systems to bolster communication security, and more particularly to utilize a constant time cryptographic co-processor engine for such communication security. For example, the disclosure includes a method for secure communication, comprising receiving encrypted data at a receiving device; obtaining a randomization for at least one bit of the encrypted data; modifying an execution of a cryptographic algorithm on the at least one bit to obtain a randomized cryptographic algorithm based on the randomization; and executing the randomized cryptographic algorithm on the at least one bit of encrypted data to recover original data associated with the encrypted data.