Abstract
In recent years, the research of technologies called Privacy Preserving Data Mining(PPDM), which aims to balance Privacy Protection and Data Utilization, has become active. One of the most important topics in this field is privacy notion, that is, discussing what has to be protected to say that one's privacy is preserved well. Among such privacy notions, Differential Privacy, which was proposed in 2006 by Dwork, attracts the most attention. This paper gives an overview of PPDM and introduces Differential Privacy briefly.
