SWISH: Secure WiFi Sharing

The fast increase of mobile Internet use motivates the need for Wi-Fi sharing solutions, where a mobile user connects to the Internet via a nearby foreign network while its home network is far away. This situation creates security challenges which are only partially solved by existing solutions like VPNs. Such solutions neglect the security of the visited network, and private users or organizations are thus reluctant to share their connection. In this paper, the authors present and implement SWISH, an efficient, full scale solution to this problem. SWISH is based on establishing a tunnel from the visited network to the user's home network.