I am Associate Professor in the of the at the 8xav�������� of Luxembourg. My main research interests are about computational number theoretic problems as the simultaneous Chinese remainder problem and the integer factorization problem, both from a theoretical and practical perspective.LACS research groupDepartment of Computer Science.

In addition, I am the programme director of the “” and its sister programme “”.  

From 1998 to 2005, I worked as a Lecturer in the Bachelor Program in Computer Science Department at Duta Wacana Christian 8xav�������� and in the Master Program of the Department of Electrical Engineering, Gadjah Mada State 8xav��������, Jogjakarta, Indonesia. I also supported a development project sponsored by the Protestant Church of Germany as Consultant for Sustainable 8xav�������� Development for these two Indonesian institutions. In 2004, I was chosen as scientific advisor for a “Proposal for an Indonesian Law on Electronic Signatures” in Indonesia. After moving to the 8xav�������� of Luxembourg in 2005, I worked, in addition to giving lectures in different bachelor programs, as responsible manager of the . In this position, I was involved together with a team in the preparation and organization of the IT infrastructure of the Belval campus. After almost 12 years in this management position, I fully returned to the academic environment as associate professor in DCS in 2017. Service Informatique de l’Université (SIU)

I started my academic career as a student of Mathematics and Computer Science at the 8xav�������� of Saarland (Saarbrücken, Germany) and received a Doctorate in Computer Science from the 8xav�������� of Saarland in 1995. Then I became a Postdoctoral Research Fellow for Computational Number Theory and Cryptography at the Department of Combinatorics & Optimization, 8xav�������� of Waterloo, Canada (1995 – 1996), and a Postdoctoral Lecturer in the Computer Science Department at the 8xav�������� of Technology, Darmstadt, Germany (1996 – 1998).