Clock frequency modulation for secure microprocessors

Details Clock frequency modulation for secure microprocessors Clock frequency modulation for secure microprocessors

1993-12-21

1995-04-04

Gregory, Bernarr

Cryptography

Cryptanalysis

380 9, 380 10, 380 28, 380 29, 380 37, 380 46, 380 48, 380 49, H04L 900

Patent

active

054044022

ABSTRACT:
A secure microprocessor is provided with reduced vulnerability to attack. In the past, the secure operation of such processors has been overcome by observing the behavior of the clock used by the processor. Such observations, and the prediction of subsequent clock pulses therefrom, are prevented by modulating the clock by a substantially random function to provide an unpredictable stream of clock pulses. The secure processor is responsive to the unpredictable stream of clock pulses for processing data in accordance with a security algorithm.

REFERENCES:
patent: 4819164 (1989-04-01), Branson
patent: 4932053 (1990-06-01), Fruhauf et al.
patent: 5001756 (1991-03-01), Mayginnes et al.

Affiliated with

Also associated with

Rating

Clock frequency modulation for secure microprocessors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock frequency modulation for secure microprocessors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock frequency modulation for secure microprocessors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2384535