Patent · US Expired

Loading data onto an electronic device

US7587600B2 · kind B2 · utility

10Cited by

9References

30Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Marcus Bodensjö · Malmö, SE
Harro Osthoff · Nuremberg, DE
Patrik Schalin · Lund, SE
Bernard Smeets · Dalby, SE

Key dates

Filing date	Sep 8, 2003
Grant date	Sep 8, 2009
Priority date	—
Expiry date	Feb 25, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/80
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method of protecting an electronic device from unauthorized reprogramming, the electronic device comprising a data memory and a key memory, the method comprising loading into the key memory a predetermined public key of a cryptographic public key mechanism for verifying subsequent data items to be loaded into the data memory, the subsequent data items being signed with a corresponding private key; characterized in that the method further comprises setting a permanent identifier in the electronic device, the permanent identifier including an identifier identifying an entity authorized to reprogram the electronic device and an indicator identifying a selected one of a number of categories of public keys.

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