Anonymous voice over IP (VoIP) communication is important for many users, in particular, journalists, human rights workers and themilitary. Recent research work has shown an increasing interest in methods of anonymous VoIP communication. This survey starts by introducing and identifying the major concepts and challenges in this field. Then we review anonymity attacks on VoIP and the existing work done to design defending strategies. We also propose a taxonomy of attacks and defenses. Finally, we discuss possible future work.

中文翻译：

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IP通信上的匿名语音调查：攻击与防御

IP匿名语音（VoIP）通信对于许多用户，尤其是新闻工作者，人权工作者和军人来说非常重要。最近的研究工作表明，人们对匿名VoIP通信方法越来越感兴趣。该调查首先介绍并确定该领域的主要概念和挑战。然后，我们回顾对VoIP的匿名攻击以及为设计防御策略所做的现有工作。我们还提出了攻击和防御的分类法。最后，我们讨论未来可能的工作。