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Diffstat (limited to 'changes')
| -rw-r--r-- | changes/bug7157 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/changes/bug7157 b/changes/bug7157 new file mode 100644 index 0000000000..4f0e3b3fcb --- /dev/null +++ b/changes/bug7157 @@ -0,0 +1,26 @@ + + o Minor features: + - Alter the Path Bias log messages to be more descriptive in terms + of reporting timeouts and other statistics. + - Create three levels of Path Bias log messages, as opposed to just + two. These are configurable via consensus as well as via torrc + options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate. + The default values are 0.70, 0.50, and 0.30 respectively. + - Separate the log message levels from the decision to drop guards, + which also is available via torrc option PathBiasDropGuards. + PathBiasDropGuards defaults to 0 (off). + - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards + 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. |