[转载]Anonymity and Privacy in Electronic Services

信息来源：http://homes.esat.kuleuven.be/~cdiaz/

We present a taxonomy of the two main building blocks used to implement anonymous communication networks, which are anonymous communication nodes (called mixes) and cover traffic policies (called dummy traffic). We propose a model for describing anonymous communication nodes which extends design possibilities and facilitates the analysis of anonymity properties. We identify the parameters which must be taken into account in the design and analysis of mix-based anonymous communication networks. In order to show the practical applications of information theoretic anonymity metrics, we have applied the metrics to evaluate the anonymity properties of various nodes for anonymous communication which have been proposed in the literature. We analyze the anonymity provided by these nodes when subject to passive and active attacks, while considering scenarios with and without cover traffic techniques.