Bachelor in Mathematics (University of Algiers -- USTHB, Algeria, 1984), Master in Operational Research (University of Grenoble, France, 1985), and PhD in Computer Science (University of Grenoble, France, 1990)
Distributed systems, Distribubuted applications (e.g. Web services), Web systems, Mobile systems, and Sensor networks. Specific topics: performance (e.g. load balancing and caching), security (e.g. access control, information flow control and aggregation), reliability, replication.