Dr. Iosif I. Androulidakis has an active presence in the ICT security field having authored more than 90 publications (including 6 books) and having presented more than 120 talks and lectures in international conferences and seminars in 20 countries. Holding 2 Ph.Ds his research interests focus on security issues in PBXs (private telephony exchanges), where he has 20 years of experience, as…