S e cu r i t y M o d e l s f o r L i g h t w e i g h t G r i d A r c h i t e c t u r e s 1

Security management is important for the effective functioning of a grid system. Here we present a security management model developed for the lightweight multilevel grid system. We decided to implement a role based security model, where a number of roles are defined for the grid. Different roles have different access restrictions. They are assigned to users and this is how users receive rights in the grid. Every cluster in the grid has security service, which handle user's identification and access control. The role based access control allows us to incorporate some simple access decision logic in the information service, which makes controlling user rights easier. Further in this paper we compare our security architecture with that of the lightweight middleware H2O and MOCCA in order to identify the important requirements, common concepts and technical solutions which may be reused.