SigningRing: Signature-based Authentication using Inertial Sensors on a Ring Form-factor

Commercial smart rings have demonstrated their utility in health applications such as sleep monitoring and fitness tracking. However, given the small size of a ring form-factor, the applicable scenarios of smart rings are still under-explored. This paper presents SigningRing, which proposes a novel functionality for the smart ring: employing the inertial sensor embedded in the smart ring for secure and fast user authentication. To access an account, the user wearing the ring will move their finger in air, tracing a signature-like pattern, as if signing their name. In our evaluation with 18 volunteers, SigningRing achieves 97.4% in balanced accuracy, with 99.8% true negative rate and 95.1% true positive rate.