TITLE:

CHAOS-BASED CRYPTOGRAPHY AND NONLINEAR PHENOMENA IN COMMUNICATION SYSTEMS (No. 3)

DATE:

Friday, April 11th, 2003

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Ljupco Kocarev, Institute of Nonlinear Sciences, University of California, San Diego

ABSTRACT:

Over the past decade, there has been tremendous interest in studying the behavior of chaotic systems. They are characterized by sensitive dependence on initial conditions, similarity to random behavior, and continuous broad-band power spectrum. Chaos has potential applications in several functional blocks of a digital communication system: compression, encryption and modulation.

In this talk I will present basic fundamentals of cryptography from the perspective of nonlinear dynamics theory and chaos theory. Chaos-based cryptography will be discussed from a point of view which I believe is closer to the spirit of both cryptography and chaos theory than the way the subject has been treated recently by many researchers. In particular, I will present my research results on the relation between chaos and cryptography, design of block encryption algorithms and pseudo-random number generators, and public-key encryption algorithms.

In the last part of my talk (if the time permits) I will briefly present my recent results on nonlinear dynamics of iterative decoding algorithms, chaos in network traffic and congestion control, and chaotic pulse position modulation.

HOST:

Antonio Palacios

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