XML ACCESS CONTROL FOR SECURITY AND MEMORY MANAGEMENT

Since XML was presented as a standard data type on the web, many data have been made and transformed into the XML type, consequently generat­ ing a large amount of XML data. Therefore, the need for efficient management and security of large-capacity XML data is gradually becoming important. The existing access control has problems that DOM trees should be loaded on mem­ ory in the process of parsing all XML documents to generate DOM trees, that a large amount of memory is used to search for trees repetitively to set access au­ thorization on all nodes of DOM trees, and that the system becomes inefficient due to complicated authorization assessment. In this paper, we suggest an ac­ cess control policy model and tree labeling algorithm for secure XML docu­ ments. So it can reduce expenses of authorization assessment of the existing ac­ cess control implemented in a complicated and repetitive way.