期刊名称：International Journal of Soft Computing & Engineering
电子版ISSN：2231-2307
出版年度：2013
卷号：2
期号：6
页码：78-82
出版社：International Journal of Soft Computing & Engineering
摘要：Peer-to-peer VoIP calls are popular due to their low cost and convenience. When these calls are encrypted and anonymized the network becomes a secured one. Tracing of the anonymous VoIP call users are important and the traced information about them should be sent to the server to know how long the users are in communication. The key challenge in tracking encrypted VoIP calls across anonymous communication system is to identify the correlation between the VoIP flows of the caller and the callee. Since all the traffic of the peer-to-peer VoIP calls are encrypted, the best way to track anonymous VoIP calls across the internet is using the Active timing based correlation. It is done by embedding a unique watermark into the inter-packet timing domain. The analysis shows that it only takes several milliseconds time adjustment to make normal VoIP flows highly unique and the embedded delay value could be preserved across the low latency anonymizing network. In this proposal, tracking of anonymous VoIP calls across internet was successfully achieved by using active time based correlation method and the results demonstrate that tracing of anonymous peer-to-peer VoIP calls on the internet is feasible and low latency anonymizing networks are susceptible to timing attacks.
