A Policy-based Institutional Web Archiving System with Adjustable Exposure of Archived Resources

Despite the recognition that Archiving Web content is important and Web archiving systems freely crawl and collect resources on the Web for preservation, they have difficulties in collecting all versions of a single Web page and in preserving a collected resource with policies of use given by its creator. In order to solve the problems, we have proposed an Institutional Web Archiving System, which collects resources with the archiving policy given to the resources by its creator/provider, and we have proposed a set of consistency management functions for the institutional Web archives. Based on our experience with the institutional Web archiving system (IWAS), we discuss usage restrictions of a resource archived in the IWAS and propose a technology to control browsing of restricted resources in accordance with the archiving policy given to the resource, e.g. access restriction to private information in a resource. We describe a function to hide protected portions of a resource using policy descriptions in the IWAS.