[tor-reports] SponsorR March 2015 report
desnacked at riseup.net
Sun Apr 5 20:41:40 UTC 2015
here is the March 2015 report for SponsorR:
- More work was performed on the first hidden service statistics .
We now update the original graphs in real time and are hosted on
- Moving onwards with new statistics, we started an analysis of the
lifetime of introduction points on a few hidden services (#15513).
We hope that this analysis will help us find bugs and better
understand Tor's introduction point behavior in general (#4862)
- We made progress on the new control port feature that makes it
easier for developers to fetch the descriptor of a hidden service
(#14847). The code has now been reviewed and is ready to be merged.
- To better understand how hidden services publish their descriptors
and how the HSDirs cache them, we wrote an in-depth walkthrough on
the relevant internals of Tor:
This analysis brought two possible solutions for #12500 and
#13483. It also put things in perspective for the HS health measurer
making it clearer to find the contention points for HS reachability.
- We wrote a proposal for changing the requirements to become an
HSDir, to make it harder for attackers to exploit the HSDir hash
- We formed an "investigation team" to better understand the poor
performance of multiple hidden services that were experiencing an
abnormal amount of clients. To analyze why the hidden services were
overloaded, we stress tested them and filed tickets of various
improvements that should be performed:
- We also investigated another potential issue with bandwidth
statistics and hidden services (#8742). A user who sets up his
hidden service on Tor relay, can get detected by looking at the
bandwidth statistics which will be oddly shaped. This problem is now
blocked by not allowing relays to be hidden services, but more
research needs to be done on other attack vectors from bandwidth
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