Olli Rantapuska

Usable Access Control inside Home Networks

WLAN link layer security has been well studied but very little work exists in the area of intuitive access control inside home networks. In this paper we propose an approach that allows fine-grained access control without overburdening users with difficult questions or complicated configuration tasks. The proposed concept originated from a user needs study and user trials, and it builds on the existing WiFi Protected Setup standard.

Contacter: An Enhanced Contact Application for Easy Update and Recovery of Contacts Using the Session Initiation Protocol (SIP)

This paper presents a peer-to-peer (P2P) application that extends functionality of Personal Information Manager (PIM) software installed in end user devices such as mobile phones. The application facilitates end-to-end connectivity by allowing devices to automatically request contact information from and update contact information stored in other devices. Utilizing automatic update of contact information the application also provides a method for recovery of lost contact information. The application utilizes the session initiation protocol (SIP) for establishing sessions between peer nodes making the system interoperable with IP multimedia subsystem (IMS) in cellular and fixed networks. The application can be used to support community services.

Grassroots Group Communication Inside Peer-to-Peer Mobile Communities

Services for group and community communication are proliferating on the Internet. In the mobile device environment, community services are only beginning to flourish. Mobile devices have been lacking in group communication features. We present a peer-to-peer framework for group communication as one approach to sharing information using mobile devices. The framework uses mobile data networks and session initiation protocol infrastructure to form connections between members and transfer data. No separate community server is used. A peer-to-peer framework is suitable for small, private groups of less than ten people and also short-lived ad hoc groups. Implementing a community service this way has many advantages. It allows pluggable community features to customize the service for different groups. It is responsive and easy to use, simple to set up and well integrated to other applications on the mobile device. Group administration is decentralized and there is no single point of failure. There is no associated cost of administering a server, and the group is even available offline. Data is transferred in the background so the users do not need to wait. Group members remain in control of their content and are able to share it with others securely