چكيده به لاتين
Abstract:
Nowadays, information on the web is rapidly increasing and a large a mount of this information is in XML format. One of the advantages of XML usage is showing of non-structured data which provides users with many abilities. The XML’s attribute of being non-structured and the flexibility of data made it popular and it is being used in databases too. Hence, providing security in XML documents is necessary. No matter in what format data are saved, they should be protected against possible threats (data stealing, damage, manipulation, hack and so on). To prevent these threats, methods and models have been developed in databases. The most important model is access control. This model is based on several methods that are used in different databases. In this dissertation, after analyzing access control methods, a new bitmap-based and function-based method in order to control access has been proposed. In this method the attempt was to resolve all problems and flaws of the bitmap-based and function-based method.
Keywords: XML Database, Access control, Security, Bitmap.
