Now-a-days, the authors are dealing with a massive amount of data that contain person-specific information. From the person-specific data it is easy to extract the sensitive information about a person by the process of linking. The size of data is increasing exponentially day-by-day. It is as much important to provide privacy as to provide utility. Objective of privacy preserving data mining is to serve knowledge extraction without leakage of private sensitive information, k-anonymity approach is a group based anonymization approach devised to achieve this objective.