Data mining is a process in which data is collected from different sources and resume it in useful information. Data mining is also known as Knowledge Discovery in Database (KDD). Privacy and accuracy are the important issues in data mining when data is shared. A fruitful direction for future data mining research will be the development of techniques that incorporate privacy concerns. Most of the methods use random permutation techniques to mask the data, for preserving the privacy of sensitive data. Randomize response techniques were developed for the purpose of protecting surveys privacy and avoiding answers bias mainly.