Securing the Grid using Virtualization: The ViSaG Model

Security in large distributed computing infrastructures, peer-to-peer, or clouds, remains a n important issue and probably a strong obstacle for a lot of p otential users of these types of computing infrastructures. In thi s paper, we propose an architecture for large scale distributed infrastructures guaranteeing confidentiality and integrity of both the computation and the host computer. Our app roach is based on the use of virtualization and we introduce the notion of confidence link to safely execute programs. We implemented and tested this approach using the POP-C++ tool, wh ich is a comprehensive object-oriented system to develop app lications in large decentralized distributed computing infrastructures. Keywords-virtualization; security in large distributed system;