Tor is a popular anonymity network, which hides both the content of traffic as well as the identities of the communicating users. We propose a novel attack that reduces the effects of existing safeguards and significantly degrades the anonymity provided by Tor. We show that an adversary is able to successfully link different circuits belonging to the same user by only controlling the middle node on a circuit. This would allow him to observe traffic of a given user for much longer than currently… CONTINUE READING