Abstract
Now indoor Location-Based Services (LBSs) have numerous applications built on indoor navigation. However, current indoor navigation can only meet the needs of finding a certain point of interest (POI), it can not help to find a certain person. Therefore, we propose Location Paging and Answering Service (LPAS) for finding out someone in an indoor environment. However, it may face serious problems of privacy disclosure of the clients' indoor location data. To ensure security, privacy and convenience, we leverage blockchain to model the indoor environment, and build Blockchain-Based Indoor LPAS (BILPAS) by embedding our three-way-handshake Diffie-Hellman Key Agreement (DHKA) procedures. Our BILPAS can automatically establish a secure and privacy communication tunnel between any two users, greatly liberating participants from unnecessary self-determining interactions. We present the proof-of-concept prototype and implement it on Hyperledger Fabric. Then, we conduct the security and privacy analysis and evaluate the time overhead. The experiment results validate the high privacy, security and convenience of our BILPAS.
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