Due to resource constraint nature of sensor nodes, the network suffers by computation and security problems. These nodes create a wireless sensor network that used sink stable or mobile as per required applications. Therefore, various traditional security techniques of the traditional networks are not possible to be applied on this network. To overcome the security problem in this ad-hoc or wireless sensor network, the current model has proposed a framework known as sink security model to secure mobile sink node with the help of an algorithm. This algorithm provides ability to mobile sink for deciding the correct situation about data reception using the past record.