Abstract-The Statistical Disclosure Attack against a particular user of an anonymity system is known to be very effective in determining, after long-term observation of the system, the set of receivers that user sends messages to. This paper first presents an improvement over this attack that, by employing a weighted mean of the observed relative receiver popularity, is more accurate than the original one based upon arithmetic mean. Second, a mathematical analysis is presented of this attack on a model, in which senders blend dummy messages with real ones. It is shown that despite such sender-generated dummy cover traffic, the attack can proceed almost unhindered. The analysis substantiates earlier empirical indications of the ineffectiveness of this countermeasure.
al. have focused on using the weighted mean instead of the arithmetic mean of the observed relative receiver popularity and their mathematical analysis on the attack model verifies their claim of the attacker not being obstacled by the sender-generated dummy traffic REF .
On the Sender Cover Traffic Countermeasure against an Improved Statistical Disclosure Attack
2010 IEEE/IFIP International Conference on Embedded and Ubiquitous Computing
2010 IEEE/IFIP International Conference on Embedded and Ubiquitous Computing
Computer Science