http://g7ee5otfyict57k24vjujuqzi6pd7iwvnsry2mt3svsgwzn6o6iynsad.onion/popets/2018/popets-2018-0011.php
In particular, the Tor protocol requires nodes to ignore messages that are not understood, in order to guarantee the compatibility with future protocol versions. This paper shows how to exploit this flexibility by proposing two new active attacks: one against onion services and the other against Tor clients. Our attack against onion services is a new low-cost sidechannel guard discovery attack that makes it possible to retrieve the entry node used by an onion service in one day, without...