Patent · US Expired

Memory device with data security in a processor

US7761717B2 · kind B2 · utility

10Cited by

14References

16Claims

0Family size

Assignee

Trident Microsystems (Far East) Ltd. · KY

Inventors

Peter Moller · Wuppertal, DE
Zoran Mijovic · Glückstadt, DE
Manfred Jünke · Gundelfingen, DE
Joachim Ritter · Herzogenaurach, DE
Steffen Zimmermann · Teningen, DE

Key dates

Filing date	Jul 10, 2002
Grant date	Jul 20, 2010
Priority date	—
Expiry date	Oct 26, 2024

Classification

Technology area (CPC G)Physics
CPC primaryG06F21/79
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A memory device containing data to be protected is integrated with a microprocessor and includes a first and a second memory portion with different accessibilities. The integration of the memory device on the same integrated circuit (IC) or chip as the microprocessor permits a combination of protective hardware and software measures that are not possible with a memory device that is on a different IC than the microprocessor. The first memory portion holds an initialization program that also serves as a boot program during decryption, and the second memory portion holds a user program, for example, a program for decrypting and/or decoding received data. Such data may be, for example, audio data encoded according to the MP3 standard and encrypted with a secret or public password against unauthorized reception.

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