Metrics for Tra c Analysis
نویسندگان
چکیده
This paper considers systems for Traac Analysis Prevention (TAP) in a theoretical model. It considers TAP based on padding and rerouting of messages and describes the eeects each has on the diierence between the actual and the observed traac matrix (TM). The paper introduces an entropy-based approach to the amount of uncertainty a global passive adversary has in determining the actual TM, or alternatively , the probability that the actual TM has a property of interest. Unlike previous work, the focus is on determining the overall amount of anonymity a TAP system can provide, or the amount it can provide for a given cost in padding and rerouting, rather than on the amount of protection aaorded particular communications.
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تاریخ انتشار 2003