1. The quieter you become, the more you are able to hear By: Ben Knapic
Onion Routing
The quieter you become, the more you are able to hear
By: Ben Knapic

2. What we’ll be discussing
What is onion routing?
How does it work?
What can we do to improve it?

3. What is Onion Routing?
Onion routing is the process of navigating networks anonymously through the use of layered encryption.

4. Conception
The framework for onion routing was first described by David Chaum in his 1981 paper titled “Untraceable electronic mail, return addresses, and digital pseudonyms”

5. Why is onion routing important?
Political Dissenters
Avoidance of Internet censorship
Private online human-to-human communication
Secret/Sensitive data
User Privacy

6. How does it work? Layered Encryption
Layered Encryption is like an onion. The encryption has layers. Onions have layers. You get it? They both have layers.

7. Multi-node Transversal

8. What about traffic sniffers? Pt. 1
Destination traffic sniffing

9. What about traffic sniffers? Pt. 2
Mid-transversal traffic sniffing

10. What about traffic sniffers? Pt. 3
Source traffic sniffing
Website fingerprinting

11. How to prevent website fingerprinting Pt. 1
Padding

12. How to prevent website fingerprinting Pt. 2
Camouflage

13. Other tips for staying anonymous
Onion Routing by itself does not guarantee anonymity
Use an anonymous currency, like Bitcoin, for financial transactions
Use the HTTPS version of websites
Don’t send out ANY information that can be traced to you while using an onion routing network
Don’t open downloaded documents while online

14. Silk Road

15. Summary
Utilizing layered encryption to navigate a network anonymously is called onion routing
Padding and camouflage can help prevent finger printing
Bitcoin, HTTPS, and avoiding opening downloaded document while online can reduce your internet footprint
The Most widely used onion routing network is Tor
The encryption methods of anonymizing networks like onions because they have layers

16. References
David L. Chaum Untraceable electronic mail, return addresses, and digital pseudonyms.Commun. ACM 24, 2 (February 1981), DOI= /
Panchenko, A., L. Niessen, et al. (2011). Website fingerprinting in onion routing based anonymization networks. Proceedings of the 10th annual ACM workshop on Privacy in the electronic society. Chicago, Illinois, USA, ACM:

17. Questions?