Simeon (simos) Xenitellis),
Main research interests
03Dec2005: Updated contact details, added URL to new blog.
30Aug2004: Updated contact details.
27Jan2004: Addition of new page on security vulnerabilities in event-driven systems.
21Aug2003: Addition of photographic gallery (120 photos). Click here.
12Jul2003: Addition of two papers in the publications section.
11Jul2003: Additions to section on personal interests.
Simeon (simos) Xenitellis (B.Sc. (Athens), M.Sc. (London)) obtained his B.Sc in Informatics in 1998 from the Technological Educational Institute of Athens and his M.Sc. in Information Security from the University of London in 1999.
Event-driven system security (you may find this page interesting)
Constantinos Markantonakis and Simeon Xenitellis, "Implementing a Secure Log File Download Manager for the Java Card", CMS'99 Computer and Communications Security, September 20-21, 1999, Katholieke Universiteit Leuven, Belgium, In Secure Information Networks, Kluwer Academic Publishers, volume 23, pages 143-159.
Simeon Xenitellis, "Applying the Blackboard Model to the Security Field", 2nd Hellenic Conference on Artificial Intelligence (SETN-02), April 11-12, 2002, Hellenic Artificial Intelligence Society (EETN) and Department of Informatics Aristotle University of Thessaloniki, Thessaloniki, Greece, In Proceedings companion volume, pages 531-536.
Simeon Xenitellis, "Security vulnerabilities in Event-Driven Systems ", IFIP / SEC2002 Security in the Information Society : Visions and Perspectives, May 7-9, 2002, Cairo, Egypt, In Security in the Information Society: Visions and Perspectives, Kluwer Academic Press, pages 147-160, available here, demonstration here.
Simeon Xenitellis, "A New Avenue of Attack: Event-driven System Vulnerabilities", ECIW 2002: The European Conference on Information Warfare and Security, July 8-9, 2002, Brunel, Uxbridge, UK, In Proceedings of European Conference on Information Warfare and Security, MCIL, pages 177-185, available here, demonstration here.
Simeon Xenitellis, "Identifying security vulnerabilities through input flow tracing and analysis", INC 2002: Third International Network Conference, July 16-18, 2002, University of Plymouth, Plymouth, UK, In Proceedings of the 3rd International Network Conference, MCB University Press (Emerald), pages 365-373.
Simeon Xenitellis, Pita Jarupunphol, "Security vulnerabilities in the Trust-List PKI", The 2003 International Conference on Security and Management (SAM'03), June 23-26, 2003, Las Vegas, USA, In Proceedings of the International Conference on Security and Management, CSREA Press, pages 72-77.
Simeon Xenitellis, Craig Valli, "A Case Study in the Security of Network-Enabled Devices", ECIW 2003: The European Conference on Information Warfare and Security, June 30-July 1, 2003, Reading, UK, In Proceedings of the 2nd European Conference on Information Warfare and Security, MCIL, pages 357-364.
I am a fan of digital photography and especially the effects you can achieve using the manual mode of the camera. This photo was taken from a park (Saville Gardens) near to the place I study (South England), at 9:00 in the night. I used a tripod and I set the camera for a long exposure shot, duration 15 seconds. Obviously it was pitch black and very difficult to get the camera focus on the subject. Read on to have a look at the photogallery gallery.
The photo of me on the top of this page was taken by one of the professors of the department. While previewing on his digital camera, I said I did not like it and asked to take another one. He did but for some reason he made available the first one. Thus, it's copied here :).
I maintain an online gallery for friends and family (contact me for URL, username/password).
I am the translation leader of the Translation Project (since '98) and the GNOME Translation Project (since '00) for the greek language. I've started the Hellenic Localisation Wiki (Knowledge Base) which is now hosted on ELLAK and continues to evolve as a public Wiki system.
Other OSS (Open Source Software) pet projects are the tcshrc project which maintains a set of configuration files for the tcsh shell (available for most Unix and Windows systems). tcshrc helps in software usability, an important aspect for software engineering.
The XNum project project is a C++ class that performs arbitrary size integer arithmetic. Using the calculation algorithms we learnt at school it can do basic arithmetic. It makes extensive use of overloading (C++ feature) and demonstrates how nicely code can be written in C++. Actually it was written very long ago, in order to calculate the number of 0s at the end of 1000! (one thousand factorial). Actually this problem can be solved with a shortcut; In 1000! one needs to count the number of the 2,5 pairs available, as they produce the zeros at the end of the number. But this is too easy...
Event-driven systems (such as Microsoft Windows) are quite interesting to study. In such a system, different programs communicate with the system through events; if you press A, notepad.exe will receive an event message saying that 'A' has been pressed. In addition, a program can send event messages to other programs, so that they can communicate. In the early days of development of Windows there was no reason to place restrictions as to which program can send what event messages to another program. Thus, nowdays in newer version of Windows where this matters (you can run applications with the credentials of different users on the same session), you can have all this sort of interesting security vulnerabilities.
The Open-source PKI Guide is a document written in 2000 to describe OSS implementations of Public Key Infrastuctures or their components. Unfortunatelly I did not have the time to expand on it and add the recent developments. If someone wants to work on it, I have a work list available. It is written in DocBook SGML; one of the tasks is to convert to DocBook XML :).
Currently there are 120 photos in the gallery. They have been resized to 800x600 (maximum) for more comfortable navigation. If you would like the full size of a photograph (for example, to set it as background for your desktop), send me an e-mail. The original dimension is 1600x1200.
Last updated: Wed Dec 7 15:16:04 BST 2005