Information about timing obfuscation in obfs4. For more information, see

[tor-dev] The limits of timing obfuscation in obfs4

Patch files

obfs4proxy-cbr.patch
Proof-of-concept for constant bitrate sending in obfs4.
obfs4proxy-wavy.patch
More complicated traffic shape (applies atop obfs4proxy-cbr.patch)

Data and graphing files

obfs4-traces-20170611.zip
Traffic traces and graphing code used to make the above graphic.

Related reading