In contemporary information society the use of fundamental rights is increasingly focused on the use of web information systems (IS). Therefore, legal aspects regulating users' rights and commitments should be given more attention in the development of IS. Mainly the section data protection and securing the integrity of IS systems should mainly be considered. The purpose of this paper is to present research in progress and to add some security related observations. As a result this paper gives some different viewpoints for the design and implementation of legally sensitive web portals and builds up a concept to improve such systems.