The Web is causing a revolution in how we represent, retrieve, and process information Its
growth has given us a universally accessible database-but in the form of a largely …

Protecting rights over relational data is of ever increasing interest, especially considering
areas where sensitive, valuable content is to be outsourced. A good example is a data …

Access control policies for XML typically use regular path expressions such as XPath for
specifying the objects for access-control policies. However such access-control policies are …

The Web is becoming the main information dissemination means in private and public
organizations. As a consequence, several applications at both internet and intranet level …

In this paper we propose and analyze a method for proofs of actual query execution in an
outsourced database framework, in which a client outsources its data management needs to …

Abstract In the Database-As-a-Service (DAS) model, clients store their database contents at
servers belonging to potentially untrusted service providers. To maintain data confidentiality …

In this paper, our objective is to define a security model for regulating access to XML
documents. Our model offers a security policy with a great expressive power. An XML …

A novel method of rights protection for categorical data through watermarking is introduced
in this paper. New watermark embedding channels are discovered and associated novel …

Web services are vulnerable to various types of security attacks. We address one type of
attacks, where applications trying to access services to which they are not authorized …

The networked and increasingly ubiquitous nature of today's data management services
mandates assurances to detect and deter malicious or faulty behavior. This is particularly …