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With the advent of the big data era, people's lifestyles are quietly changing. Social networking has become an Indispensable part, but there is a great leaks risk of user's privacy in social network. Based on the problems of big data, social network big data and privacy data on the social network, this paper has analyzed privacy protection methods and problems in traditional social network, described the current privacy protection research status and its key technologies of social network indoi:10.12783/dtcse/aice-ncs2016/5715 fatcat:gx73amzjtzgwppmusz6ndno67y