document: Hordes : a multicast based protocol for anonymity With widespread acceptance of the Internet as a public medium for communication and information retrieval , there has been rising concern that the personal privacy of users can be eroded by cooperating network entities . A technical solution to maintaining privacy is to provide anonymity . We present a protocol for initiator anonymity called Hordes , which uses forwarding mechanisms similar to those used in previous protocols for sending data , but is the first protocol to make use of multicast routing to anonymously receive data . We show this results in shorter transmission latencies and requires less work of the protocol participants , in terms of the messages processed . We also present a comparison of the security and anonymity of Hordes with previous protocols , using the first quantitative definition of anonymity and unlinkability . Our analysis shows that Hordes provides anonymity in a degree similar to that of Crowds and Onion Routing , but also that Hordes has numerous performance advantages
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