Patent · US Active

Protecting cryptographic keys stored in non-volatile memory

US12393702B2 · kind B2 · utility

0Cited by

7References

20Claims

0Family size

Assignee

Cryptography Research, Inc. · US

Inventors

Mark Evan Marson · Carlsbad, US
Michael Alexander Hamburg · 's-Hertogenbosch, NL

Key dates

Filing date	Jun 30, 2022
Grant date	Aug 19, 2025
Priority date	—
Expiry date	Jan 5, 2044

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/14
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Systems and methods for protecting cryptographic keys stored in a non-volatile memory. An example method may comprise: storing a device root key in a non-volatile memory; storing a volatile key in a volatile memory; storing a masked cryptographic key in the non-volatile memory, wherein the masked cryptographic key is produced by combining a cryptographic key and the device root key; storing a masked device root key in the non-volatile memory, wherein the masked root key is produced by combining the device root key and the volatile key; and erasing the device root key from the non-volatile memory.

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