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    A First-Hop Traffic Analysis Attack Against Tor

    Feghhi, Saman and Leith, Douglas J. (2014) A First-Hop Traffic Analysis Attack Against Tor. Working Paper. UNSPECIFIED.

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    We introduce an attack against encrypted web traffic passing over the first hop – between client and Tor gateway – of the Tor network. The attack makes use only of packet timing information on the uplink and so is impervious to packet padding defences. In addition, we show that the attack is robust against the randomised routing used in Tor. We demonstrate the effectiveness of the attack at identifying the web sites being visited by a Tor user, achieving mean success rates of 68%. As well as being of interest in its own right, this timing-only attack serves to highlight deficiencies in existing defences and so to areas where it would be beneficial for Tor and VPN designers to focus further attention.

    Item Type: Monograph (Working Paper)
    Keywords: First-Hop; Traffic Analysis; Tor; attack;
    Academic Unit: Faculty of Science and Engineering > Research Institutes > Hamilton Institute
    Item ID: 6964
    Depositing User: Hamilton Editor
    Date Deposited: 09 Feb 2016 12:29
    Funders: Science Foundation Ireland (SFI)

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