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| author | Nick Mathewson <nickm@torproject.org> | 2019-01-15 12:24:20 -0500 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2019-01-15 12:24:20 -0500 |
| commit | e1cb6341f97a18d362fe024b823dbd08b4724988 (patch) | |
| tree | 2b9f4432a4fd2c71b013f53cb2bbd462b898c923 | |
| parent | d8902c2e74845c5da5ab5066f57f22f8b209693a (diff) | |
| parent | 09814d9109d801a9995890dbde0dcca1f5370683 (diff) | |
| download | torspec-e1cb6341f97a18d362fe024b823dbd08b4724988.tar.gz torspec-e1cb6341f97a18d362fe024b823dbd08b4724988.zip | |
Merge remote-tracking branch 'asn-github/bug28142'
| -rw-r--r-- | proposals/254-padding-negotiation.txt | 16 | ||||
| -rw-r--r-- | tor-spec.txt | 6 |
2 files changed, 21 insertions, 1 deletions
diff --git a/proposals/254-padding-negotiation.txt b/proposals/254-padding-negotiation.txt index 19ab6ce..087f060 100644 --- a/proposals/254-padding-negotiation.txt +++ b/proposals/254-padding-negotiation.txt @@ -178,7 +178,7 @@ following: * For other bins, uniformly sample a time value between this bin and the next bin, and schedule padding then. -3.1.2 Histogram Token Removal +3.1.1.1. Histogram Token Removal Tokens can be optionally removed from histogram bins whenever a padding or non-padding packet is sent. With this token removal, the histogram functions @@ -211,6 +211,20 @@ start_usec+rtt_estimate+range_sec are treated as part of the bin before the infinity bin. Tokens are not removed from the infinity bin when non-padding is sent. (They are only removed when an "infinite" delay is chosen). +3.1.2. Delay Probability Distribution + +Alternatively, a delay probability distribution can be used instead of a +histogram, to sample padding delays. + +In this case, the designer also needs to specify the appropriate distribution +parameters, and when a padding cell needs to be scheduled, the padding +subsystem will sample a positive delay value (in microseconds) from that +distribution (where the minimum delay is range_usec+start_usec as is the case +for histograms). + +We currently support the following probability distributions: + Uniform, Logistic, Log-logistic, Geometric, Weibull, Pareto + 3.2. State Machine Selection Clients will select which of the defined available padding machines to use diff --git a/tor-spec.txt b/tor-spec.txt index 7204989..b2b26eb 100644 --- a/tor-spec.txt +++ b/tor-spec.txt @@ -2105,3 +2105,9 @@ see tor-design.pdf. "1" -- consensus methods 9 through 20. "2" -- consensus method 21 (adds ed25519 keys to microdescs). + +9.11. "Padding" + + Describes the padding capabilities of the relay. + + "1" -- Relay supports circuit-level padding. |