%0 Journal Article %J HELLENIC OPEN UNIVERSITY JOURNAL OF INFORMATICS %D 2007 %T Cryptographically secured communication between tutors of the Computer Science course of the Hellenic Open University: Experiences from the introductory module ‘Introduction to Computer Science’(in Greek) %A Stamatiou, Yiannis %A Christos J. Pierrakeas %A Xenos, Michalis %B HELLENIC OPEN UNIVERSITY JOURNAL OF INFORMATICS %V 1 %G eng