Patent · US Active

Dynamic cryptographic key expansion

US11216592B2 · kind B2 · utility

0Cited by

2References

15Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Roberto Avanzi · Munich, DE
Darren Lasko · Forest, US

Key dates

Filing date	Aug 2, 2018
Grant date	Jan 4, 2022
Priority date	—
Expiry date	Jun 5, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/125
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Some embodiments include systems and methods for the management of a plurality of expanded cryptographic keys associated with a plurality of corresponding Protected Software Environments (PSEs) supervised by PSE-management software running on a computer system. In one embodiment, a computer system has a first processor, a first memory controller, and a first RAM. The first memory controller has a first memory cryptography circuit connected between the first processor and the first RAM. The memory cryptography circuit comprises a keystore and a first cryptographic engine. The keystore comprises a seedstore and a key-expansion engine. The seedstore is configured to store a first plurality of cryptographic key seeds accessible by a key identifier, for use by the key-expansion engine to generate expanded keys, where each key seed corresponds to a corresponding client.

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