Patent · US Active

Hardware masked substitution box for the data encryption standard

US11018849B2 · kind B2 · utility

1Cited by

4References

20Claims

0Family size

Assignee

Cryptography Research, Inc. · US

Inventors

Matthew Pond Baker · San Francisco, US
Elena Trichina · Munich, DE
Jean-Michel Cioranesco · Paris, FR
Michael Hutter · Walnut Creek, US

Key dates

Filing date	Oct 28, 2019
Grant date	May 25, 2021
Priority date	—
Expiry date	Oct 28, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/12
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

An integrated circuit may implement a masked substitution box that includes substitution function components, a decoder, and a logic component. Each of the substitution function components may receive a same input value and a different mask value and may generate a respective output mask value based on the same input value and respective different mask value The decoder may receive an input mask value and generate a decoded output value that is based on the received input mask value. The logic component may select one of the output mask values from one of the substitution function components based on the decoded output value.

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