XML Access Control Models

Extensible Markup Language (XML) is defined by World Wide Web Consortium (W3C) as a standard for data representation and transmission on the Web. The disseminated XML documents on the Web may contain a secret data that must be protected from ineligible access, so XML access control is an important issue in Web information security. XML access control refers to the practice of limiting access to (parts of) XML data to only authorized users. Here we tried to study, compare and analyze different approaches towards Access control and its policies.