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Internet anonymity and privacy

Anonymity is the state of being not identifiable within a set of subjects.

AmironCarro
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Internet anonymity and privacy

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  1. Internet Anonymity

  2. Topics we will cover in this presentation: • Introduction • Types of Anonymity Systems • I2P Overview • Working Mechanism of I2P • Conclusion

  3. Introduction • Anonymity means that the real author of a message is not known

  4. Introduction • Anonymity is a combination of both Unidentifiability; observers cannot identify any individual agent Unlinkability; observers cannot link an agent to a specific message or action

  5. Introduction Why is anonymous web browsing needed? • Privacy • Freedom of Speech • Anti-cencorship

  6. Steps to hide the real identity through several servers

  7. Proxy Servers The basic idea behind a proxy server is that a client uses a proxy server to surf the web as in the figure below.

  8. Remailers Remailers enable users to send electronic messages through their server so that sender can not be traced. Remailers typically remove all identifying information from e-mails before forwarding them to their destination. Known examples are Cypherpunk, Mixmaster.

  9. Mix Network The basic building block of these systems, is a set of mix processes where each mix process takes ciphertext messages that are encrypted with the mix process’s public key as inputs. Mix process groups messages together as a batch and forwards the encrypted messages to the next mix process at certain flush times along with dummy messages.

  10. Onion Routing The basic idea is very similar to the mix system but performance is improved by using symmetric keys for relaying messages and asymmetric keys to establish circuits in the system.

  11. I2P • I2P (Invisible Internet Project) is an anonymous network, exposing a simple layer that applications can use to anonymously and securely send messages to each other.

  12. I2P works by routing traffic through other peers, as shown in the picture. All traffic is encrypted end-to-end.

  13. Conclusion Anonymity networks such as Tor & I2P can't solve all anonymity problems. It focuses only on protecting the transport of data.

  14. Also, to protect your anonymity, be smart. Don't provide your name or other revealing information in web forms.

  15. Be aware that, like all anonymizing networks that are fast enough for web browsing, Tor does not provide protection against end-to-end timing attacks: If your attacker can watch the traffic coming out of your computer, and also the traffic arriving at your chosen destination, he can use statistical analysis to discover that they are part of the same circuit.

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