Blocking attacks on SIP VoIP proxies caused by external processing

@article{Zhang2010BlockingAO,
  title={Blocking attacks on SIP VoIP proxies caused by external processing},
  author={Ge Zhang and Simone Fischer-H{\"u}bner and Sven Ehlert},
  journal={Telecommunication Systems},
  year={2010},
  volume={45},
  pages={61-76}
}
As Voice over IP (VoIP) applications become increasingly popular, they are more and more facing security challenges that have not been present in the traditional Public Switched Telephone Network (PSTN). One of the reasons is that VoIP applications rely heavily on external Internet-based infrastructures (e.g., DNS server, web server), so that vulnerabilities of these external infrastructures have an impact on the security of VoIP systems as well. This article presents a Denial of Service (DoS… CONTINUE READING
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