Technical Design Documentation about Host Security
Whonix™ without Physical Isolation
Affects Standard / Download version (host+VM+VM). Does not affect Whonix with Physical Isolation.
Robert Ransom pointed out: "The main lesson of Bug #6537: Possible timing side-channel in router selection and Bug #6538: Use bit-twiddling tricks to make choose-by-bandwith algorithm even more time-invariant was that Tor is not designed to keep various sensitive pieces of information secret from other native-code programs running on the same physical processor."