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发表刊物：
The 18th ACM International Conference on Information Processing in Sensor Networks(IPSN)
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关键字：
Symmetric key generation, piezo vibration sensor, compressive sensing, heartbeat signal, interpulse interval
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摘要：
We present Heartbeats-2-Bits (H2B), which is a system for securely pairing wearable devices by generating a shared secret key from the skin vibrations caused by heartbeat. This work is motivated by potential power saving opportunity arising from the fact that heartbeat intervals can be detected energy-efficiently using inexpensive and power-efficient piezo sensors, which obviates the need to employ complex heartbeat monitors such as Electrocardiogram or Photoplethysmogram. Indeed, our experiments show that piezo sensors can measure heartbeat intervals on many different body locations including chest, wrist, waist, neck and ankle. Unfortunately, we also discover that the heartbeat interval signal captured by piezo vibration sensors has low Signal-to-Noise Ratio (SNR) because they are not designed as precision heartbeat monitors, which becomes the key challenge for H2B. To overcome this problem, we first apply a quantile function-based quantization method to fully extract the useful entropy from the noisy piezo measurements. We then propose a novel Compressive Sensing-based reconciliation method to correct the high bit mismatch rates between the two independently generated keys caused by low SNR. We prototype H2B using off-the-shelf piezo sensors and evaluate its performance on a dataset collected from different body positions of 23 participants. Our results show that H2B has a pairing success rate of 95.6%. We also analyze and demonstrate H2B’s robustness against three types of attacks. Finally, our power measurements show that H2B is very power-efficient.
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全部作者：
Weitao Xu,Jun Liu,Abdelwahed Khamis,Wen Hu,Mahbub Hassan,Aruna Seneviratne
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第一作者：
林祺
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论文类型：
论文集
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是否译文：
否
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发表时间：
2019-04-01
