This thesis examines usability issues of P3P relative to WAP. Through the WAP-technology, people have the possibility to access the Internet from their mobile phones. This technique makes users more vulnerable as they expose their personal information. P3P is a technical specification, designed to help users gain more control over the use of their personal information on Internet sites they visit.



To be able to utilise the P3P functionality, it is important that users comprehend P3P vocabulary and also that they understand how to make privacy preference settings. A vocabulary test and a usability test were performed. The interface investigated in the usability test was a multiple-level menu design for privacy settings for mobile phones.



The vocabulary test was performed on 87 students at Karlstad University, by using a self-completion questionnaire. The usability test was performed on six people in the Ozlab at Karlstad University.



The conclusions from the tests are that sub-menus have to be distinct from each other and most terms have to be explained. Some users do not perceive underlining in a WAP user interface as indication of links, in spite of their familiarity with web standards.