Blockchain is used to create a platform for the protection from identity theft and other fraud activities .Individuals can also easily create a self identity on blockchain that is fully controlled by the individual itself  personally .so it may be difficult to steal and the blockchain technology could provide a decentralized method of registration that is it cannot be taken without the consent of the owner .Since this is not controlled by a third party influence blockchain technology have renowned with negative and positive effect .Blockchain was originally developed to solve the double spending in cryptocurrency .blockchain enabled the first peer to peer cryptocurrency that is Bitcoin .