Patent · US Active

Hardware masked substitution box for the data encryption standard

US10461925B2 · kind B2 · utility

1Cited by

2References

5Claims

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	Aug 9, 2017
Grant date	Oct 29, 2019
Priority date	—
Expiry date	Feb 23, 2038

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 a counter that generates counter values. An input mask component may generate unmasked input values based on a combination of respective counter values and an input mask value. Furthermore, a substitution function component may receive the unmasked input values and may generate output values based on respective unmasked input values and a substitution function. An output mask component may generate masked output values based on a combination of respective output values and an output mask value. The masked output values may be stored at memory elements.

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