Security is one of major issues in WSNs as poor security disrupts the entire network and can have a significant effect on data transmission. So, the focus of the current research is to develop a secure Z-MAC protocol along with the implementation of elliptic curve encryption and IHOP mechanism. Basic Z-MAC protocol and secure Z-MAC protocol were compared in terms of the stages and performance while they were introduced with blackhole, flooding, and DDOS attacks. It was found that secure Z-MAC protocol ensures high security and performance even when the network is introduced with variety of attacks. It was also observed that delay in packets was minimal when secure Z-MAC protocol was implemented in the network.