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AudioKey: a usable device pairing system using audio signals on smartwatches

机译:AudioKey:使用SmartWatches上的音频信号的可用设备配对系统

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摘要

Smartwatches are expected to replace smartphones in some applications with better user experience because of a greater range of features and new innovations such as audio recording, activity recognition, and data transmission. In this paper, we develop a system called AudioKey, aiming to pair two smartwatches by generating a unique secret key between them. Compared with existing works, our system does not need extra infrastructure to synchronise devices and trigger the key generation process, and only uses the existing sensors (gyroscope and microphone) that are deployed on most smartwatches. AudioKey triggers the key generation process on two devices at the same time by detecting the handshake between two normal users. A secret key is extracted from both the frequency domain and the time domain of audio signals and used to authenticate each other or encrypt the sensitive data. Evaluation results collected on nine volunteers in three different scenarios show that our system can achieve a bit generation rate of 13.4 bits/s with the mean key agreement rate of 96.7% for a 128-bit secret key, while a strong attacker can only achieve a mean key agreement of 10.8%.
机译:预计SmartWatches将在具有更好的用户体验的某些应用中替换智能手机,因为更大的功能和新的创新,如音频记录,活动识别和数据传输。在本文中,我们开发一个名为Audkey的系统,旨在通过在它们之间产生唯一的密钥来配对两个Smartwatches。与现有工程相比,我们的系统不需要额外的基础架构来同步设备并触发关键生成过程,并且只使用在大多数SmartWatch上部署的现有传感器(陀螺仪和麦克风)。 AudioKey通过检测两个普通用户之间的握手触发两个设备上的密钥生成过程。从频域和音频信号的时域中提取秘密密钥,并用于互相认证或加密敏感数据。在三种不同场景中收集的评估结果在三种不同的情景中收集了九个志愿者,表明,我们的系统可以实现13.4位的比特生成率,平均关键协议率为128位密钥,而强大的攻击者只能实现一个强大的攻击者平均关键协议为10.8%。

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