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diff --git a/projects/tor/disths.mdwn b/projects/tor/disths.mdwn new file mode 100644 index 0000000..a03f3dc --- /dev/null +++ b/projects/tor/disths.mdwn @@ -0,0 +1,24 @@ +[[!meta title="Distributed Tor Hidden Services"]] + +For my third year project, I worked on allowing distribution in Tor hidden +services. My [report](report.pdf) is available (the [design +archive](archive.tar.gz) is also). + +# Abstract + +Tor is an low latency, onion routing system that anonymizes TCP streams. One +particular Tor feature is hidden services, these provide responder anonymity, +this means the identity of the server providing the service, is hidden from the +requester (user) of the service. + +While modern web services, which can use techniques like anycast and DNS +(domain name system) round robin to distribute clients across many servers, the +main load for a Tor hidden service, will always go through a single node in the +Tor network. This has implications for the availability and scalability of Tor +Hidden Services, which has knock on implications anonymity of the hidden +service, as downtime can possibly reveal information about its real world +location. I aim to modify Tor to allow for distributed hidden services. + +This was achieved, however a deterministic property was added to the +introduction points, which can be used to attack the service. A approach to +solve this is discussed. |