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CSFW
2009
IEEE

More Anonymous Onion Routing Through Trust

10 years 2 months ago
More Anonymous Onion Routing Through Trust
We consider using trust information to improve the anonymity provided by onion-routing networks. In particular, we introduce a model of trust in network nodes and use it to design path-selection strategies that minimize the probability that the adversary can successfully control the entrance to and exit from the network. This minimizes the chance that the adversary can observe and correlate patterns in the data flowing over the path and thereby deanonymize the user. We first describe the general case in which onion routers can be assigned arbitrary levels of trust. Selecting a strategy can be formulated in a straightforward way as a linear program, but it is exponential in size. We thus analyze a natural simplification of path selection for this case. More importantly, however, when choosing routes in practice, only a very coarse assessment of trust in specific onion routers is likely to be feasible. Therefore, we focus next on the special case in which there are only two trust le...
Aaron Johnson, Paul F. Syverson
Added 20 May 2010
Updated 20 May 2010
Type Conference
Year 2009
Where CSFW
Authors Aaron Johnson, Paul F. Syverson
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