Re: [tor-dev] Feedback on obfuscating hidden-service statistics

> The next problem is how to find the proper parameters for the Laplace > distribution. I guess the mean μ needs to be 0, but the hard part is > 'b'. In a few papers I read, they set 'b' to (Δf/ε). > > In the above, Δf is the "largest change a single participant could > have on the output" of the

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

Comments on proposal 238: 1. I’m not convinced that the proposed amount of obfuscation is sufficient for the HS descriptor count. Adding noise to cover the contribution in a single period of any single HS doesn’t cover its vector of contributions. Thus, if over time the number of HSes stays the

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

"A. Johnson" writes: > Hi George, > >> I posted an initial draft of the proposal here: >> https://lists.torproject.org/pipermail/tor-dev/2014-November/007863.html >> Any feedback would be awesome. > > OK, I’ll have a chance to look at this in the next few days. > >> Specifically, I would be inter

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

Hi George, > I posted an initial draft of the proposal here: > https://lists.torproject.org/pipermail/tor-dev/2014-November/007863.html > Any feedback would be awesome. OK, I’ll have a chance to look at this in the next few days. > Specifically, I would be interested in undertanding the concept

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

"A. Johnson" writes: > Hello all, > > > >> We put in some simple obfuscations in order to not reveal too >> sensitive data: we multiplied actual values with a random number in >> [0.9, 1.1] before including those obfuscated values in extra-info >> descriptors. Maybe there's something smarter we

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

"A. Johnson" writes: >> Roger's branch was a PoC that wrote stats on the log file. I don't >> think we have newer data than what is in #13192. It's unclear whether >> the relays stopped collecting statistics, or they just haven't updated >> the trac ticket. > > If we could check on that and get t

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

> Roger's branch was a PoC that wrote stats on the log file. I don't > think we have newer data than what is in #13192. It's unclear whether > the relays stopped collecting statistics, or they just haven't updated > the trac ticket. If we could check on that and get that data, that would be really

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

> On Nov 21, 2014, at 9:39 AM, George Kadianakis wrote: > > I also believe that some of these extra stats (e.g. "How many > failures/anomalies do we observe?") should first be done on a privnet > instead of the real network. That can give us some preliminary > results, and then we can consider d

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

"A. Johnson" writes: > A response to George’s comment: "The timeline here is that we are hoping the > proposal _and_ the > implementation to be ready by mid-December… I'm currently OK with the two > statistics in: > … I >

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

A response to George’s comment: "The timeline here is that we are hoping the proposal _and_ the implementation to be ready by mid-December… I'm currently OK with the two statistics in: … I feel that any other statistics wil

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

On 20/11/14 13:42, George Kadianakis wrote: > "A. Johnson" writes: > > George and I have been working on a small proposal to add two > hidden-service related statistics: number of hidden services and > total hidden-service traffic. Great, I’m starting to focus more on this

Re: [tor-dev] Feedback on obfuscating hidden-service statistics

"A. Johnson" writes: George and I have been working on a small proposal to add two hidden-service related statistics: number of hidden services and total hidden-service traffic. >>> >>> Great, I’m starting to focus more on this project now. Well, >>> actually I’m going on a trip