Spyros T. Halkidis Alexander Chatzigeorgiou George Stephanides Moving from Requirements to Design Confronting Security Issues: A Case Study. 798-814 2009 OTM Conferences (2) http://dx.doi.org/10.1007/978-3-642-05151-7_4 conf/otm/2009-2 db/conf/otm/otm2009-2.html#HalkidisCS09