UNIVERSITY of PELOPONNESE

Department of Informatics and Telecommunications

RESEARCH PROJECTS
Latest news

HANDiCAMS: Heterogeneous Ad–hoc Networks for Distributed, Cooperative, and Adaptive Multimedia Signal Processing

10/2013 – 09/2016

Katholieke Universiteit Leuven,
Dept. of Electrical Engineering

Coordinator: M. Moonen
Funded by: European Commission – FET

Summary: The project aims at developing a new ICT paradigm, which considers multiple devices in a heterogeneous dynamic ad-hoc network that cooperate to perform multiple signal processing tasks. The main objective is to develop distributed, cooperative and adaptive algorithms for the acquisition, coding, processing, and in-network fusion of multimedia signals. As the network nodes may be selfish, opportunistic, or malicious, general operating principles will be designed that provide incentives for cooperation and assure network security.

ART–IN–SPACE: Adaptive, Robust to Threats, Immune to Nonlinearities, Sparse Opportunistic Cognitive Radio

10/2012 – 09/2015

National and Kapodistrian Univ. of Athens,
Dept. of Informatics and Telecomm.

Coordinator: N. Kalouptsidis
Funded by: NSRF, EXCELLENCE Program

Summary: Cognitive Radio (CR) systems have been recently proposed as the means to solve the spectral congestion problem. This project aims at developing a game–theoretic framework to considerably increase the performance of CR systems, and their ability to cope with grand challenges of wireless networks regarding confidentiality, nonlinearities during transmission, and cooperative protocols.

SWINCOM: Secure Wireless Nonlinear Communications at the Physical Layer

02/2012 – 07/2015

National and Kapodistrian Univ. of Athens,
Dept. of Informatics and Telecomm.

Coordinator: N. Kalouptsidis
Funded by: NSRF, THALIS Program

Summary: Next generation wireless networks impose strict requirements regarding the reliability, power consumption, spectrum management, and the security offered. The proposed research aims at making notable advancements in the above areas by developing novel tools and algorithms based on the concepts of sparsity, compressive sampling and cooperation. Emphasis is given on the construction of efficiently decodable LDPC codes (approaching secrecy capacity) and the development of new PHY layer joint cryptographic and error–correcting techniques.

Study of Complexity and Pseudorandomness Properties in Symmetric Encryption Algorithms

02/2006 – 03/2008

National and Kapodistrian Univ. of Athens,
Dept. of Informatics and Telecomm.

Coordinator: N. Kalouptsidis
Funded by: General Secretariat for Research and Technology – British Council

Summary: Research was conducted in cooperation with the information security group of the Royal Holloway Univ. of London. It aimed at studying and analyzing the security offered by most contemporary symmetric block cryptographic algorithms under the context of the new cryptanalytic attacks (algebraic attacks, attacks based on Gröbner bases, time–memory trade off attacks, etc.).

Application of Economic Theories to Design and Develop Telecommunications and Information Systems and Products

09/2004 – 12/2007

National and Kapodistrian Univ. of Athens,
Dept. of Informatics and Telecomm.

Coordinator: N. Kalouptsidis
Funded by: 3rd Community Support Framework (O.P. Education II)

Summary: The project aimed at conducting research on security mechanisms, protocols, and architectures for wireless mobile networks, as well as, on their impact on the demand for associated 3G and 4G services offered by mobile telecomm. operators.

Study of Stream Ciphers in Symmetric Cryptography

01/2005 – 12/2005

National and Kapodistrian Univ. of Athens,
Dept. of Informatics and Telecomm.

Coordinator: N. Kalouptsidis
Funded by: General Secretariat for Research and Technology

Summary: The project aimed at detailed theoretical study of stream cryptographic algorithms. It was comprised by an analysis of the existing algorithms for the computation of the maximum order complexity, as well as, the development of new more efficient ones. Research results were published in international journals and conferences.

SecurE–Justice

02/2004 – 08/2004

Project Automation SpA,
e–Business Division

Coordinator: F. Cunsolo
Funded by: European Commission

Summary: The project aimed at developing a secure communication and collaboration framework for the judicial co–operation environment. I was the team leader, whereas other responsibilities included writing of deliverables and management reports, and guiding the user requirements collection and the design process of the platform.

Diastasis

12/2002 – 08/2004

European Dynamics SA,
e–Business Division

Coordinator: N. Kolokotronis
Funded by: Eurostat

Summary: The project aimed at defining, measuring, and exploiting new socio–economic indicators by correlating web usage statistical information and household research data. I was the project coordinator, and my responsibilities included the coordination of platform development, the definition of the data fusion methodology for correlating various data sources, and the criteria used for assessing the results obtained.

Icte–Pan

12/2002 – 08/2004

European Dynamics SA,
e–Business Division

Coordinator: K. van Isacker
Funded by: European Commission

Summary: The project aimed at producing intelligent collaboration and transaction environments in public administration networks. I was involved in the collection of user requirements, the analysis of best practices in the area of e–government, and the development of the methodology to be used for evaluating the resulting e–government platform.

Channel Sounder

02/2000 – 05/2001

National Technical Univ. of Athens,
Dept. of Electrical and Computer Engineering

Coordinator: P. Konstantinou
Funded by: General Secretariat for Research and Technology

Summary: The project aimed at the development of smart measuring devices for the multi–dimensional characterization of wide area mobile radio–channels. I was involved with the development of DSP algorithms for estimating the direction of arrival of the received signals at the antenna (MUSIC and its variants, ESPRIT, SAGE, Expectation Maximization, etc.), the design of decimation/interpolation filters, computation of the PDP, as well as the implementation of BPSK modulation/demodulation.

Billing Mall

04/1999 – 03/2001

National and Kapodistrian Univ. of Athens,
Dept. of Informatics and Telecomm.

Coordinator: D. Martakos
Funded by: General Secretariat for Research and Technology

Summary: The project aimed at studying inter–organizational information systems, the role of certification authorities, the procedures for authenticating entities, implementing secure payments over the Internet, and finally the development of an integrated e–commerce centre. I was leading the effort of developing the security policy and determining the network security protocols to be adopted. I was also involved in the design of the electronic bill presentment and payment model, based on the thin consolidator model.

Euromed

01/1998 – 12/1998

National Technical Univ. of Athens,
Dept. of Electrical and Computer Engineering

Coordinator: A. Marsh, S. Theodoridis
Funded by: European Commission

Summary: The project aimed at developing standards for processing and visualizing medical images, as well as, DSP algorithms for medical image compression. I was involved with the analysis/study of several image compression techniques and other structures in order to support progressive image transmission and regions of interest.