diff options
| -rw-r--r-- | changes/bug7157 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/changes/bug7157 b/changes/bug7157 index fad3977bf..4f0e3b3fc 100644 --- a/changes/bug7157 +++ b/changes/bug7157 @@ -13,3 +13,14 @@ in combination with PathBiasExtremeRate. - Increase the default values for PathBiasScaleThreshold and PathBiasCircThreshold from 200 and 20 to 300 and 150, respectively. + - Add in circuit usage accounting to path bias. If we try to use a + built circuit but fail for any reason, it counts as path bias. + Certain classes of circuits where the adversary gets to pick your + destination node are exempt from this accounting. Usage accounting + can be specifically disabled via consensus parameter or torrc. + - Convert all internal path bias state to double-precision floating + point, to avoid roundoff error and other issues. + - Only record path bias information for circuits that have completed + *two* hops. Assuming end-to-end tagging is the attack vector, this + makes us more resilient to ambient circuit failure without any + detection capability loss. |