Location-enabled applications now permeate the mobile computing landscape. As technologies like Bluetooth Low Energy (BLE) and Apple's iBeacon protocols begin to see widespread adoption, we will no doubt see a proliferation of indoor location enabled application experiences. While not essential to each of these applications, many will require that the location of the device be true and verifiable. In this paper, we present LocAssure, a new framework for trusted indoor location estimation. The system leverages existing technologies like BLE and iBeacons, making the solution practical and compatible with technologies that are already in use today. In this work, we describe our system, situate it within a broad location assurance taxonomy, describe the protocols that enable trusted localization in our system, and provide an analysis of early deployment and use characteristics. Through developer APIs, LocAssure can provide critical security support for a broad range of indoor location applications.

In recent years, there has been an explosion of social and collaborative applications that leverage location to provide users novel and engaging experiences. Current location technologies work well outdoors but fare poorly indoors. In this paper we present LoCo, a new framework that can provide highly accurate room-level location using a supervised classification scheme. We provide experiments that show this technique is orders of magnitude more efficient than current state-of-the-art Wi-Fi localization techniques. Low classification overhead and computational footprint make classification practical and efficient even on mobile devices. Our framework has also been designed to be easily deployed and leveraged by developers to help create a new wave of location-driven applications and services.

We present HABLO, an acoustic beacon system for low-range (<; 0.5 m) indoor localization, which remains a difficult task for existing indoor localization technologies. The beacons utilize an audio band which is inaudible to humans but can be received by the microphones on consumer devices such as laptops, tablets and smartphones. HABLO is designed to be low-cost, easy to integrate with existing infrastructure using USB connectors and to be usable with unmodified end-user devices. We present a technical description of the software and hardware implementation of our prototype and show the results of an initial feasibility study of our system for a localization application within an office environment.