312 About the Contributors Anargyros Chryssanthou studied Applied Informatics in Athens University of Economics and Business. He holds an MSc in Information Security and Computer Crime from the University of Glam- organ (Wales – UK). He has written and presented several articles in national conferences, concerning various aspects of computer security, from network forensics to cryptography, security management and ISO implementations of Information Security Management Systems (ISMS). He worked in the past as a Database Reporting Specialist for Coca Cola Hellenic Bottle and Company and designed several commercial database applications. He is currently employed by the Hellenic Data Protection Authority as an ICT Auditor, where his duties include auditing the use of personal data by companies of the public and the private sector. He is currently working most on spam issues as well as on privacy and security issues of the Greek medical sector. His research interests include network security, cryptography, with special interest on steganography, which was the subject of his MSc thesis, and computer forensics, where he is currently aiming on building a concise forensic methodology on investigating electronic crime in general and privacy violations in particular. Ioannis Apostolakis was born in Chania of Crete and studied Mathematics in the University of Athens. He has a MSc in Informatics, Operational Research and Education issues and also a PhD in Health Informatics. He had Post Doctoral studies in Medical Informatics. He had been for several years scientific researcher in the Department of clinical therapeutics in the University of Athens. He has research and educational activities in issues of Health Informatics and Education. He is working as Visiting Professor at National School of Public Health, Greece. More information is available at http:// www.iapostolakis.gr Iraklis Varlamis is a lecturer at the Department of Informatics and Telematics of Harokopio Uni- versity of Athens. He received his Ph.D. in Computer Science from Athens University of Economics and Business, Greece. From 1999-2004, he was member of the DB-NET (http://www.db-net.aueb.gr/) research group (Head: Associate Prof. Vazirgiannis) and since 2005 he is collaborating with the WIM (http://wim.aueb.gr) research group (Head: Associate Prof. Vassalos). His research interests vary from data-mining and the use of semantics in web mining to virtual communities and their applications in education and healthcare. He has published several articles in international journals and conferences, concerning web document clustering, the use of semantics in web link analysis and web usage mining, word sense disambiguation using thesauruses, virtual communities in healthcare etc. He has lectured databases and data mining, information systems and software technology as a lecturer and visiting lec- turer at Harokopio University of Athens, Athens University of Economics and Business, the University Copyright © 2011, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. About the Contributors of Peloponnese, the University of Central Greece, and the University of Aegean. More information is available at http://www.dit.hua.gr/~varlamis * * * Luís Antunes obtained a PhD in Computer Science at University of Porto. Currently he is an Aux- iliary Professor at the Computer Science Department at University of Porto. Most of his research is on Computational Complexity and Cryptography. He is in the Coordination Committee of the first Health Informatics Master course in Portugal and has a strong collaboration with the Medical School of Porto University. He supervises several Master and PhD students in areas such as Access Control and Infor- mation Measures for Cryptography protocols. Rafae Bhatti received the BS degree in electronics engineering from Ghulam Ishaq Khan Institute of Engineering Sciences and Technology (GIKI), Pakistan, in 1999 and the MS and PhD degrees in computer engineering from Purdue University in 2003 and 2006, respectively. This work was done when he was a postdoc at IBM Almaden Research Center. His PhD research is in the area of information systems security, in particular access management in federated systems and specification of XML-based security protocols for Web-based information systems. His recent work focuses on designing privacy and security technologies for application in the healthcare delivery. His work on XML-based access control framework for the Role-Based Access Control (RBAC) model has recently been cited by the OASIS consortium in their official announcement of the RBAC standard. He is a member of the IEEE and the IEEE Computer Society. He currently works at Oracle. David W. Chadwick is a Professor of Information Systems Security at the University of Kent. He is the leader of the Information Systems Security Research Group (ISSRG) at Kent and a member of IEEE and ACM. His group are the creators of PERMIS (www.openpermis.org), an open source X.509 and SAML supported role based authorisation infrastructure which is part of the US NMI software suite. It is currently integrated with Globus Toolkit, Shibboleth, Apache and OMII-UK and is currently being integrated into the UK's National Grid Service. Aristotelis A. Chatziioannou received a Diploma in Electrical & Computer Engineering and a Ph.D. in Metabolic Engineering and Medical Informatics from the National Technical University of Athens (NTUA) Greece in 1996 and 2005 respectively. From June 2004 up to August 2005 he was with Al. Flem- ing Biomedical Science Research Center as an expert in Bioinformatics. Since September of 2005 he is with the Institute of Biological Research & Biotechnology in the National Hellenic Research Foundation, where he holds the position of the Principal Investigator (elected Research Assistant Professor) of the group of Metabolic Engineering and Bioinformatics. He has designed and directed and co-developed GRISSOM, the first Grid-based platform at European level, for the analysis and interpretation of DNA microarray experiments. His published work includes 16 journal papers, 3 book chapters and more than 50 papers in conference proceedings. His scientific activities include metabolic engineering, genomics, biological ontologies, bioinformatics, computational biology, biomedical image processing. He is also associate Editor of the journal Frontiers in Systems Biology. 313 About the Contributors Ricardo João Cruz Correia obtained a PhD in Medical Informatics at University of Porto. Cur- rently he is an Assistant Professor at the Department of Biostatistics and Medical Informatics at the Faculty of Medicine of the University of Porto. His research interest is the electronic patient records and on the integration of heterogeneous healthcare information systems. He supervises several Master students in areas such as Patient Records Integration, Telemedicine, Clinical Decision Support Systems and Information Flow in clinical departments. Stelios Daskalakis holds a PhD in Health Informatics from the National and Kapodistrian Univer- sity of Athens (Greece). He is a research associate of the Health Informatics Laboratory at the Faculty of Nursing of the aforementioned University. His research interests focus on human/ behavioral and social aspects of technology adoption in a variety of domains including SOA (Service-Oriented Archi- tectures) and enterprise interoperability, health informatics and e-Learning. The area of his research analysis emphasizes on quantitative methods, in particular partial least squares path modeling. He has participated both as presenter and reviewer in international conferences and has authored a series of scientific papers appearing in international conferences and journals. He also possesses substantial IT industry experience, having served as a Senior IT Consultant/Architect in leading multinational infor- mation technology organizations. Charalampos Doukas has received the Diploma in Information & Communication Systems Engi- neering from the University of the Aegean Greece in 2005 and is currently a PhD student at the same department. His main interests include video and image processing of medical data, medical ontolo- gies and semantics, medical data classification and data transmission over heterogeneous networks. He has published more than 25 papers in international scientific conferences, 8 journal papers and 4 book chapters. He is member of the Technical Chamber in Greece, member of Hellenic Artificial Intelligence Society, member of IEEE EMBS Greek Society and peer reviewer in scientific journals like IEEE Transactions on Information Technology in Biomedicine and IEEE Transactions in Medical Imaging. He is currently working as an external researcher at the University of the Aegean and at National Hel- lenic Research Institute. Stelios Eliakis is a Researcher and a PhD Candidate at the Department of Management Science and Technology of the Athens University of Economics and Business (AUEB). He holds a B.Sc. in informatics and a M.Sc. in Information Systems from AUEB. His research areas are IS Security, e-business integra- tion, electronic services, interoperability, Web Services and RFID. He has participated in several national and European projects such as SMART (FP6), MeDAS and HERMES (the Greek e-Government case). He has published his work in international conferences such as MIMI2007, ETFA2008 and MCIS2009. Ana Ferreira is an IT specialist at Porto Faculty of Medicine; she