Sriram Mohan: Curriculum Vitae

Being able to express and enforce role-based access control on XML data is a critical component of XML data management. However, given the semi-structured nature of XML, this is non-trivial, as access control can be applied on the values of nodes as well as on the structural relationship between nodes. ACXESS introduces a notion of security views to enforce access control for XML data repositories. I have introduced an algebraic security view specification language SSX[1] for DBAs to specify access constraints for different user groups. ACXESS does not materialize the security views and enforces the access constraints via query rewrites.