Roger Dingledine March 2013 update 1 2 3 4 5 6 7 8 9 10 - - PowerPoint PPT Presentation

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Roger Dingledine March 2013 update 1 2 3 4 5 6 7 8 9 10 - - PowerPoint PPT Presentation

Jan 20, 2024 7 likes •241 views

Roger Dingledine March 2013 update 1 2 3 4 5 6 7 8 9 10 Tor 0.2.4.7-alpha .. 0.2.4.9-alpha New stronger/faster ECC-based link encryption New stronger/faster ECC-based circuit handshake (ntor, curve25519) Support for exiting

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Roger Dingledine March 2013 update

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Tor 0.2.4.7-alpha .. 0.2.4.9-alpha

  • New stronger/faster ECC-based link

encryption

  • New stronger/faster ECC-based circuit

handshake (ntor, curve25519)

  • Support for exiting to IPv6 destinations
  • “Directory guards” to reduce user

enumeration risks

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Tor 0.2.4.10-alpha .. 0.2.4.11-alpha

  • Better Sybil-resistance
  • Harder for relays to lie about their

bandwidth

  • Change circuit create queue from size-

based to time-based

  • Resolve a DPI fingerprint for Tor's SSL

transport

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In upcoming Tor 0.2.5.x-alpha

  • Clients can reach dir auths via IPv6
  • Clients can specify their own cipher lists
  • Bridge relays can load their own SSL

link certificate

– (more useful for debugging than I'd

realized!)

  • Fixed more issues in TestingTorNetwork
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Outreach

  • Access Innovation Awards
  • 29c3 talk
  • DEA meeting
  • Dutch / Belgian law enforcement
  • Jake's Burma trip
  • OONI meeting in Amsterdam
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Pluggable Transport work

  • obfs3 implementation
  • “pyobfsproxy”
  • Format-transforming encryption
  • “Scramblesuit”
  • Flashproxy (second developer;

standalone flashproxy; move to opt-in?)

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Number of Flash Proxies

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Number of flashproxy clients

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Georgetown / NRL collaborations

  • Aaron and Sathya's path selection

simulator / entropy work

  • Rob's throttling evaluation paper
  • Proposal 218 (instrumenting relays)
  • Shadow now supports multi-threading
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Misc other progress

  • Upcoming release of new “Stem” python

Tor controller library

  • Roadmap document for a Tor censorship

debugger

  • NDSS “rbridge” paper (bridge

distribution strategy)

  • Waterloo path splitting paper
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Start on VoIP questions

  • VoIP:

– Push-to-talk VoIP-alike over TCP – Skype itself over TCP

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What to expect next time

  • uTP branch for simulator testing
  • Compose pluggable transports (e.g.

flashproxy + chopper + obfs3)

  • Safely record and report obfsproxy stats
  • Alternate scheduling / throttling /

weighting / flow control

  • Integrate 'optimistic data' feature into TBB