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Hope of Delivery: Extracting User Locations From Mobile Instant Messengers. (arXiv:2210.10523v1 [cs.CR])
Oct. 20, 2022, 1:20 a.m. | Theodor Schnitzler, Katharina Kohls, Evangelos Bitsikas, Christina Pöpper
cs.CR updates on arXiv.org arxiv.org
Mobile instant messengers such as WhatsApp use delivery status notifications
in order to inform users if a sent message has successfully reached its
destination. This is useful and important information for the sender due to the
often asynchronous use of the messenger service. However, as we demonstrate in
this paper, this standard feature opens up a timing side channel with
unexpected consequences for user location privacy. We investigate this threat
conceptually and experimentally for three widely spread instant messengers. We …
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