With the rapid evolution of the Internet, it has become a significant issue to further enhance the security of traditional protocols which were lack of comprehensive security considerations when originally designed. Among them, the Domain Name System (DNS) as the most important infrastructure is a typical one. To deal with the DNS security risks (e.g., Distributed Denial-of-Service (DDoS), DNS hijack and etc.), multiple extension protocols have been developed. The DNS management architecture has also been optimized from various aspects. Nowadays, as individual privacy on the Internet is attracting more and more attention, it is becoming one of the most important tasks for both DNS itself and its related applications to guarantee the privacy of end-user. This paper mainly studies the problem of DNS privacy leakage and analyzes some promising solutions. However, these solutions may affect the performance of some Internet services related to the DNS like the “Butterfly Effect”. It is highly advised that the whole community should pay more attention to the issue of adding DNS privacy, while maintaining the stability and backward compatibility

随着Internet的快速发展，进一步增强传统协议的安全性已成为一个重要问题，传统协议在最初设计时就没有全面的安全考虑。其中，最重要的基础架构就是域名系统（DNS）。为了应对DNS安全风险（例如，分布式拒绝服务（DDoS），DNS劫持等），已经开发了多种扩展协议。DNS管理体系结构还从各个方面进行了优化。如今，随着Internet上的个人隐私越来越受到关注，它已成为DNS本身及其相关应用程序中确保最终用户隐私的最重要任务之一。本文主要研究DNS隐私泄漏问题，并分析一些有希望的解决方案。但是，这些解决方案可能会影响与DNS相关的某些Internet服务的性能，例如“蝴蝶效应”。强烈建议整个社区在保持稳定性和向后兼容性的同时，更应注意增加DNS隐私的问题。