Your Echos are Heard: Tracking, Profiling, and Ad Targeting in the Amazon Smart Speaker Ecosystem. (arXiv:2204.10920v2 [cs.CR] UPDATED)

Smart speakers collect voice input that can be used to infer sensitive
information about users. Given a number of egregious privacy breaches, there is
a clear unmet need for greater transparency and control over data collection,
sharing, and use by smart speaker platforms as well as third party skills
supported on them. To bridge the gap, we build an auditing framework that
leverages online advertising to measure data collection, its usage, and its
sharing by the smart speaker platforms. We …

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