Powering for Privacy: Improving User Trust in Smart Speaker Microphones with Intentional Powering and Perceptible Assurance
Powering for Privacy: Improving User Trust in Smart Speaker Microphones with Intentional Powering and Perceptible Assurance
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发表时间：
2023
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通讯作者：
Youngwook Do;Nivedita Arora;Ali Mirzazadeh;Injoo Moon;Eryue Xu;Zhihan Zhang;G. Abowd;Sauvik Das
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作者：
Youngwook Do;Nivedita Arora;Ali Mirzazadeh;Injoo Moon;Eryue Xu;Zhihan Zhang;G. Abowd;Sauvik Das
智能扬声器配备始终开启的麦克风，以促进基于语音的交互。为了解决用户隐私问题，现有设备具有许多隐私特征：例如，静音按钮和本地密码检测模块。但用户很难相信这些供应商提供的隐私功能真的有用，因为存在激励机制错位：谷歌、Meta和亚马逊从收集个人数据中获益，用户也知道这一点。我们需要的是可感知的保证--用户可以通过身体感知来验证这些隐私功能是否真的有用。为此，我们介绍，实施和评估“有意供电”麦克风的想法，为用户提供可感知的智能扬声器隐私保证。我们采用迭代设计过程来开发Candid Mic，这是一种无电池无线麦克风，只能通过从有意的用户交互中收集能量来供电。此外，用户可以直观地检查能量收集模块和麦克风之间的连接（断开）。通过受试者内实验，我们发现Candid Mic为用户提供了关于麦克风是否捕获音频的可感知保证，并提高了用户对使用智能扬声器相对于静音按钮界面的信任。
Smart speakers come with always-on microphones to facilitate voice-based interaction. To address user privacy concerns, existing devices come with a number of privacy features: e.g., mute buttons and local trigger-word detection modules. But it is difficult for users to trust that these manufacturer-provided privacy features actually work given that there is a misalignment of incentives: Google, Meta, and Amazon benefit from collecting personal data and users know it. What’s needed is perceptible assurance — privacy features that users can, through physical perception, verify actually work. To that end, we introduce, implement, and evaluate the idea of “intentionally-powered” microphones to provide users with perceptible assurance of privacy with smart speakers. We employed an iterative-design process to develop Candid Mic , a battery-free, wireless microphone that can only be powered by harvesting energy from intentional user interactions. More-over, users can visually inspect the (dis)connection between the energy harvesting module and the microphone. Through a within-subjects experiment, we found that Candid Mic provides users with perceptible assurance about whether the microphone is capturing audio or not, and improves user trust in using smart speakers relative to mute button interfaces.