P. Belsis, S. Gritzalis and S.K. Katsikas, “A scalable security architecture enabling coalition formation between autonomous domains”, in Proceedings, 5th IEEE International Symposium on Signal Processing and Information Technology (ISSPIT ’05), Athens, Greece, σελ. 560-565, 2005.
S.K. Katsikas, J. Lopez and G. Pernul, “Trust, privacy and security in e-business: Requirements and solutions”, in Proceedings, 10th Panhellenic Conference on Informatics, Volos, Greece, σελ. 548-558, 2005.