Published November 30, 2015
| Version v1
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No Place to Hide that Bytes won’t Reveal: Sniffing Location-Based Encrypted Traffic to Track a User’s Position
- 1. Sapienza University of Rome
Description
p>News reports of the last few years indicated that several intelligence agenciesbr />
are able to monitor large networks or entire portions of the Internet backbone.br />
Such a powerful adversary has only recently been considered by the academic literature.br />
In this paper, we propose a new adversary model for Location Based Services (LBSs).br />
The model takes into account an unauthorized third party, di erent from the LBSbr />
provider itself, that wants to infer the location and monitor the movements of a LBSbr />
user. We show that such an adversary can extrapolate the position of a target user bybr />
just analyzing the size and the timing of the encrypted trac exchanged between thatbr />
user and the LBS provider. We performed a thorough analysis of a widely deployedbr />
location based app that comes pre-installed with many Android devices: GoogleNow.br />
The results are encouraging and highlight the importance of devising more e ectivebr />
countermeasures against powerful adversaries to preserve the privacy of LBS users./p>
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