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Tor: The Anonymity Project

Tor: The Anonymity Project. Ben Cumber. Roadmap. What is Tor? Who made Tor ? How does Tor work? Who uses Tor ? How well does Tor work? Hidden Services Tor and the NSA The Dark Side of Tor Questions?. What is Tor?. Tor or TOR? Open Source Funded by DoD , EFF, Google, … Mission

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Tor: The Anonymity Project

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  1. Tor: The Anonymity Project Ben Cumber

  2. Roadmap • What is Tor? • Who made Tor? • How does Torwork? • Who uses Tor? • How well does Tor work? • Hidden Services • Tor and the NSA • The Dark Side of Tor • Questions?

  3. What is Tor? • Tor or TOR? • Open Source • Funded by DoD, EFF, Google, … • Mission • Make anonymity possible. • The internet should not automatically broadcast all of our information, we should be able to choose what information we want to share.

  4. What is Tor?

  5. What is Tor?

  6. Who made Tor? • The Tor Project is a non-profit organization • Creator of • Tor Browser • Tails OS • Orbot • Tor is based on Onion Routing • Concept developed originally by the U.S. Navy. • http://www.onion-router.net/

  7. How Does Tor Work? • Onion Routing • A protocol developed by the U.S. Navy • A packet is sent through a series of nodes. • Each node removes a “layer” of encryption.

  8. How Does Tor Work? • TLS Link encryption • Tor Relays • User owned/run • Listed in the Tor main directory • Bridge Relays • User owned/run • Not listed in the main directory

  9. Who Uses Tor? All Users

  10. Who Uses Tor? • Human Rights Activists • Anonymity is important for safety. • Anonymity allows for the “word” to get out. • Businesses • Spy on competition • Governments • Law Enforcement

  11. Who Uses Tor? • Private Citizens • Bloggers • Sick People • Consumers • Oppressed Users • 8 year olds • …

  12. How well does Tor work? • It does what it claims to do. • Provides some anonymity. • Does not guarantee anonymity. • Susceptible to • End to End correlation • Man in the Middle Attacks • Tor vs Proxies

  13. Hidden Services • Hidden services are the “Deep web/Dark web” • Really they are just anonymous websites/services accessible using only Tor. • Silk Road is an example of these.

  14. Hidden Services

  15. Tor and the NSA • Has Tor been compromised? • Not that we can tell. • “We will never be able to de-anonymize all Tor users all the time but with manual analysis we can de-anonymizea very small fraction of Tor users” • Instead, we’ll just make Tor hard to use. • “GOAL: Degrade Tor experience”

  16. The Dark Side of Tor • The Silk Road • Was run by Ross William Ulbricht. • Generated 9.5 million BTC in sales($2.1 BILLION) • Silk Road itself received ~$90 million in commission.

  17. The Dark Side of Tor • Silk Road’s transactions • Drugs, Hitmen, Weapons, Paraphernalia, Child Pornography, Money laundering, …

  18. The Dark Side of Tor • Silk Road Takedown • Tor was not compromised. • Ross William Ulbricht made a mistake! • Asked a Tor-specific question on Stack Exchange while logged into the wrong account.

  19. The Dark Side of Tor • Ulbricht is charged with drug trafficking, and multiple other charges related to running the Silk Road. • He is also charged with hiring a hitman. • The FBI seized $28.5 million in Bitcoins from Ulbricht. • He claims he’s innocent.

  20. The other Dark Side of Tor • “The Black Market: Reloaded” • Another Silk Road type website. • Is Tor at fault for making these sites possible? • Are the pros of Tor enough to outweigh the cons?

  21. Questions?

  22. References • https://www.torproject.org/ • http://www.theguardian.com/technology/2013/nov/05/tor-beginners-guide-nsa-browser • https://metrics.torproject.org/users.html • https://tails.boum.org/about/index.en.html • http://www.youtube.com/watch?v=35l56KjTCb8 • http://en.wikipedia.org/wiki/Onion_routing • http://www.forbes.com/sites/andygreenberg/2013/11/06/as-ross-ulbricht-appears-in-new-york-court-his-lawyer-says-hes-not-the-fbis-dread-pirate-roberts/ • http://exitevent.com/privacy-tor-btc-and-what-the-silk-road-crackdown-means-to-you-131112.asp

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