Regulating Access To Semistructured Information on the Web

The remarkable growth of the World Wide Web in recent years has made it possible to distribute information to users in the form of an unorganized and unstructured collection of documents. While security is an important aspect in such a scenario, access control systems available today result too rigid and limited. We present an approach to specify and enforce access restrictions to Web documents. The approach provides flexible, as it allows to enforce a variety of security policies and requirements at a fine-grained level without affecting the data organization.