Swipe2Pair: Secure and Fast In-Band Wireless Device Pairing
Proceedings of the 17th ACM Conference on Security and Privacy in Wireless and Mobile Networks(2024)
摘要
Wireless device pairing is a critical security mechanism to bootstrap the
secure communication between two devices without a pre-shared secret. It has
been widely used in many Internet of Things (IoT) applications, such as
smart-home and smart-health. Most existing device pairing mechanisms are based
on out-of-band channels, e.g., extra sensors or hardware, to validate the
proximity of pairing devices. However, out-of-band channels are not universal
across all wireless devices, so such a scheme is limited to certain application
scenarios or conditions. On the other hand, in-band channel-based device
pairing seeks universal applicability by only relying on wireless interfaces.
Existing in-band channel-based pairing schemes either require multiple antennas
separated by a good distance on one pairing device, which is not feasible in
certain scenarios, or require users to repeat multiple sweeps, which is not
optimal in terms of usability.
Therefore, an in-band wireless device pairing scheme providing high security
while maintaining high usability (simple pairing process and minimal user
intervention) is highly desired. In this work, we propose an easy-to-use mutual
authentication device pairing scheme, named Swipe2Pair, based on the proximity
of pairing devices and randomization of wireless transmission power. We conduct
extensive security analysis and collect considerable experimental data under
various settings across different environments. Experimental results show that
Swipe2Pair achieves high security and usability. It only takes less than one
second to complete the pairing process with a simple swipe of one device in
front of the other.
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