中文摘要：

随着信息技术的发展,社交网络逐渐成为人们沟通的主要方式,而敏感信息暴露在开放的社交网络中所导致的多种隐私信息泄露问题也引起了人们的日益关注。首先,介绍了社交网络及隐私的相关概念;其次,对当前社交网络中的隐私保护所采用的主要方法：匿名技术和访问控制技术进行了详细的介绍、分析和讨论;最后,对现有方法存在的问题和挑战进行了分析,并给出了一些潜在的研究热点,为未来研究工作指明方向。

英文摘要：

Social network has gradually become the main way in communication with the development of information technology and the issue of privacy preserving in social network has also obtained more and more attention due to the interactive information exposed in the open social networks. Firstly, an overview of the concept of social network and privacy was givem. Secondly, the current mainly two methods： anonymity mechanism and access control technique employed for privacy preservation in social networks were reviewed and discussed. Finally, the vulnerabilities and challenges of the current mechanism were analyzed and the potential research issues for the future research works were showed.