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 …

delivery hope instant messengers mobile

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