Protecting User Privacy in an Untrustworthy Environment

Sammanfattning: With more and more widespread use of web services in building distributed applications grows and the need to develop and implement adequate mechanisms for protection of such applications. The purpose of this paper is to investigate ways for achieving high security by using encryption during development of applications providing web services. The main task of the paper is to show a universal security model design guidelines for protecting user privacy in an untrustworthy Environment.