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The investigation of the performance of the Particle Swarm Optimization (PSO) method in Integer Programming problems, is the main theme of the present paper. Three variants of PSO are compared withâ€¦ (More)

This paper investigates the ability of the Particle Swarm Optimization (PSO) method to cope with minimax problems through experiments on well{known test functions. Experimental results indicate thatâ€¦ (More)

- Elena C. Laskari, Gerasimos C. Meletiou, Yannis C. Stamatiou, Michael N. Vrahatis
- Computational Intelligence in Informationâ€¦
- 2007

The past decade has witnessed an increasing interest in the application of Computational Intelligence methods to problems derived from the field of cryptography and cryptanalysis. This phenomenon canâ€¦ (More)

- Elena C. Laskari, Gerasimos C. Meletiou, Yannis C. Stamatiou, Michael N. Vrahatis
- Applied Mathematics and Computation
- 2007

In this contribution instances of a problem introduced by the differential cryptanalysis of Feistel cryptosystems are formulated as optimization tasks. The performance of Evolutionary Computationâ€¦ (More)

The spread of database technologies has allowed corporations and scientific organizations to collect huge amounts of data. Analysis of the contents of these databases can contribute to knowledgeâ€¦ (More)

- Michael N. Vrahatis, Georgios A. Tsirogiannis, Elena C. Laskari
- Mathematical and Computer Modelling
- 2010

During the last few years considerable effort has been devoted to research related to chaotic encryption. In this paper a new symmetric key cryptosystem that exploits the idea of nonlinear mappingsâ€¦ (More)

- Elena C. Laskari, Konstantinos E. Parsopoulos, Michael N. Vrahatis
- Numerical Algorithms
- 2003

One of the most commonly encountered approaches for the solution of unconstrained global optimization problems is the application of multi-start algorithms. These algorithms usually combine alreadyâ€¦ (More)

The exponential growth of databases containing personal information has rendered the task of extracting high quality information from collections of such databases very important. This task isâ€¦ (More)

- Elena C. Laskari, Gerasimos C. Meletiou, Dimitris K. Tasoulis, Michael N. Vrahatis
- Mathematical and Computer Modelling
- 2005

K e y w o r d s P r i v a c y , Electronic data gathering, E-voting protocols, Discrete logarithm. We would like to thank the editor and the reviewers for their concern. Moreover, we acknowledge theâ€¦ (More)

The Discrete Logarithm and the Diffie-Hellman are two hard computational problems, closely related to cryptography and its applications. The computational equivalence of these problems has beenâ€¦ (More)