Patent · US Active

Device with multiple roots of trust

US11216389B2 · kind B2 · utility

1Cited by

8References

20Claims

0Family size

Assignee

Cryptography Research, Inc. · US

Inventors

Ambuj Kumar · Sunnyvale, US
William Craig Rawlings · Saratoga, US

Key dates

Filing date	Dec 1, 2016
Grant date	Jan 4, 2022
Priority date	—
Expiry date	Dec 1, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG06F2221/2145
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A container from a first root of trust associated with a first root entity may be received. The container may correspond to a mapping of a resource of an integrated circuit that is associated with the first root entity. The container may be verified based on a key that corresponds to the first root of trust and that is stored in the integrated circuit at manufacturing of the integrated circuit. An identification may be made that an assignment of the resource from the container corresponds to assigning the resource from the first root of trust to a new root of trust. A new key corresponding to the new root of trust may be generated. Information corresponding to the new key may be stored into a memory of the integrated circuit. Furthermore, the new key may be used to delegate the resource to a subsequent container.

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