[tor-dev] Pluggable Transports 2.0, draft 1 Specification

[Brandon Wiley <brandon@xxxxxxxxx>]

As was discussed in the Pluggable Transports session at TorDev Amsterdam, the Pluggable Transports 2.0, draft 1 specification [https://www.pluggabletransports.info/spec/pt2draft1] was created by a committee of censorship circumvention tool developers: Tor, Lantern, Psiphon, and uProxy. It specifies a version of Pluggable Transports that meets the needs of multiple circumvention tools.

There is one major change that has implications for tor, which is that the Pluggable Transports 2.0, draft 1 IPC protocol uses a different type of SOCKS authentication mechanism, which allows for larger parameters to be send to transports.

We are currently working on a 2nd draft of this specification, which will incorporate changes and errata from the community censorship circumvention tool community. For instance, syntactic errors in the documentation of the Go interface will be fixed in draft 2. Tor developers participated in the specification meetings, and now feedback from the overall Tor community is requested for incorporation in the next draft. There will also likely be a 2.1 specification process, possibility starting August, where we will consider larger changes.

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