name:  Carlos Serr�o
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The author is a professor at ISCTE, a Portuguese public University
specilized in Management and Computer Science, teaching subjects like IT
Management and E-Commerce. The author is also IT Research and Development
Consultant at ADETTI, a portuguese R&D institution, where he is specialized
in information security, colaborating in several European Community IT
projects: OKAPI, OCTALIS and OCCAM.