Patent · US Active

Cryptographic key distribution

US11544413B2 · kind B2 · utility

1Cited by

2References

14Claims

0Family size

Assignee

Nordic Semiconductor ASA · NO

Inventors

Frank Aune · Trondheim, NO
Jean-Baptiste Brelot · Trondheim, NO

Key dates

Filing date	May 2, 2019
Grant date	Jan 3, 2023
Priority date	—
Expiry date	May 2, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/12
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An integrated-circuit device comprises a processor, a hardware key-storage system, and a key bus. The hardware key-storage system comprises a non-volatile key storage memory, which includes a key register, for storing a cryptographic key, and an address register, for storing a destination memory address for the cryptographic key. The hardware key-storage system further comprises output logic for sending the cryptographic key over the key bus to the destination memory address, and write-once logic for preventing an address being written to the address register unless the address register is in an erased state.

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