A sequence-based traffic analysis attack using size and timing of padded DNS queries identifies visited websites from the Alexa top-10k with at least 50% accuracy on 80.2% of sites and 100% accuracy on 32% of sites in closed-world tests.
The EDNS(0) Padding Option
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Padding Ain't Enough: Assessing the Privacy Guarantees of Encrypted DNS
A sequence-based traffic analysis attack using size and timing of padded DNS queries identifies visited websites from the Alexa top-10k with at least 50% accuracy on 80.2% of sites and 100% accuracy on 32% of sites in closed-world tests.