A Security Framework for SenSearch

摘要

We have designed and implemented a search and rescue system called SenSearch[1], [3] for a wilderness environment. In such an environment, there is no Internet connectivity, no cellular network, and building an adhoc network from randomly-scattered mobile devices is infeasible due to an extremely sparse environment. SenSearch is comprised of three components: (1) mobile, in-situ sensors that are worn by users (e.g. hikers); (2) access points (AP) that collect information from these sensors; and (3) GPS receivers. The key idea of SenSearch is that it uses a concept of witnesses to convey a user's movement and location information to the outside world. This averts a need for maintaining a connected network to transmit location information to the outside world. In particular, there is no need for expensive GSM or satellite transmitters, or maintaining an adhoc network of in-situ sensors in SenSearch.