Dionysiou received her PhD, MS, and BS degrees in computer science from Washington State University in 2006, 2000, 1997 respectively and Diploma degree from Higher Technical Institute in 1994. During her PhD work, Dionysiou has worked on projects funded by the National Institute of Technology and the National Science Foundation in the USA and served as a reviewer for several scientific conferences and journals. Dionysiou�s research focuses on trust and security in distributed environments.