Our group is involved in the European funded Webocracy project in which an e-government system called Webocrat has been designed and implemented. Our responsibility is to provide m...
In this paper we describe the work devising a new technique for role-finding to implement Role-Based Security Administration. Our results stem from industrial projects, where larg...
We propose an approach for the selective enforcement of access control restrictions in, possibly distributed, large data collections based on two basic concepts: i) flexible autho...
Sabrina De Capitani di Vimercati, Sara Foresti, Su...
Abstract: In order to achieve efficient execution plans for queries comprising userdefined data types and predicates, the database system has to be provided with appropriate index ...
Abstract. We present a new model that provides clear and precise semantics for authorization. The semantics is independent from underling security mechanisms and is separate from i...