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Nymble Blocking System is a IEEE research paper.

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 Introduction  Nymble  Properties  System Architecture  Security Model  Limitations  Conclusion Nymble Blocking System 3
 Anonymous network o IP hiding facilities o Polipo, Tor, USAIP  Users misuses this network for abuse  They deface popular websites  Websites cannot blacklist individual IP address  They blacklist entire anonymizing network Nymble Blocking System 4
 In pseudonymous credential systems Users are added to a blacklist Weak in anonymity  In anonymous credential system Group signatures Lacks scalability Nymble Blocking System 5
 A system that allows websites to selectively blacklist users of anonymizing networks.  Blocks user without user's IP-address.  Legitimate users enjoy anonymity.  Blacklisted users got blocked for future connections.  Previous connections remain unlinkable. Nymble Blocking System 6
 Anonymous Authentication  Backward Unlinkability  Subjective Blacklisting Nymble Blocking System 7
 Fast Authentication Speeds  Rate-Limited Anonymous Connections  Revocation Auditability Nymble Blocking System 8
 User  The Pseudonym Manager  The Nymble Manager  Server Nymble Blocking System 9
Fig. The Nymble system architecture showing the various modes of interaction Nymble Blocking System 10
Fig: The Nymble system architecture showing how a user is blacklisted Nymble Blocking System 11
Nymble Blocking System 12
Aims four security goals  Blacklistability  Rate-limiting assures  Nonframeability  Anonymity Nymble Blocking System 13
 Sybil attack  Mimics IP based blocking  Availability of multiple IP address helps users circumvent the system Nymble Blocking System 14
 Nymble is comprehensive credential system.  Add a layer of accountability to any publicly known anonymizing network.  Servers blacklist misbehaving users maintaining their privacy.  Increase the mainstream acceptance of anonymizing network. Nymble Blocking System 15
 www.airccse.org  www.torproject.org  www.sciencedirect.com  www.wikipedia.com Nymble Blocking System 16
Nymble Blocking System 17
Nymble: Blocking System

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Nymble: Blocking System

  • 1. 1
  • 2.
  • 3.  Introduction  Nymble  Properties  System Architecture  Security Model  Limitations  Conclusion Nymble Blocking System 3
  • 4. Anonymous network o IP hiding facilities o Polipo, Tor, USAIP  Users misuses this network for abuse  They deface popular websites  Websites cannot blacklist individual IP address  They blacklist entire anonymizing network Nymble Blocking System 4
  • 5.  In pseudonymous credential systems Users are added to a blacklist Weak in anonymity  In anonymous credential system Group signatures Lacks scalability Nymble Blocking System 5
  • 6.  A system that allows websites to selectively blacklist users of anonymizing networks.  Blocks user without user's IP-address.  Legitimate users enjoy anonymity.  Blacklisted users got blocked for future connections.  Previous connections remain unlinkable. Nymble Blocking System 6
  • 7.  Anonymous Authentication  Backward Unlinkability  Subjective Blacklisting Nymble Blocking System 7
  • 8.  Fast Authentication Speeds  Rate-Limited Anonymous Connections  Revocation Auditability Nymble Blocking System 8
  • 9. User  The Pseudonym Manager  The Nymble Manager  Server Nymble Blocking System 9
  • 10. Fig. The Nymble system architecture showing the various modes of interaction Nymble Blocking System 10
  • 11. Fig: The Nymble system architecture showing how a user is blacklisted Nymble Blocking System 11
  • 13. Aims four security goals  Blacklistability  Rate-limiting assures  Nonframeability  Anonymity Nymble Blocking System 13
  • 14.  Sybil attack  Mimics IP based blocking  Availability of multiple IP address helps users circumvent the system Nymble Blocking System 14
  • 15.  Nymble is comprehensive credential system.  Add a layer of accountability to any publicly known anonymizing network.  Servers blacklist misbehaving users maintaining their privacy.  Increase the mainstream acceptance of anonymizing network. Nymble Blocking System 15
  • 16.  www.airccse.org  www.torproject.org  www.sciencedirect.com  www.wikipedia.com Nymble Blocking System 16