Abstract:Datamining is mining useful information from huge dataset. We can classify a datamining system based on the type of knowledge mined. that is datamining system is classified based on the functionalities such as characterization, discrimination, association and correlation analysis, classification, Prediction. Discrimination is an important problem when considering legal and ethical aspects such unfairly treating based on their specific belonging group. discrimination means distinguishing, that is distinguishing the people based on their age, race, gender etc. Antidiscrimination techniques are used for preventing the dataset from discrimination. Discrimination can be classified into two direct and indirect discrimination. Direct discrimination means directly rejecting people on the basis of their age, gender etc. Indirect means rejecting people based on their background knowledge. In this paper, we discuss about how can prevent both direct and indirect discrimination on same time and α- protective Incognito.