Internet-of-Things (IoT) is an inevitable domain of technology that is going to capture the connectivity of the majority of the smart devices in the coming days supported by huge advancement in mobile computing. However, IoT still suffers serious security issues when it comes to performing extensive communication over a broad range of heterogeneous devices. A review of existing secure routing schemes shows that they are complex in operation overlooking the communication performance and resource-constrained factors. Therefore, the proposed system introduces a very novel, simple, and cost-effective, secure routing scheme that is not only capable of identifying the threats without any apriority information of adversary, but they are equally capable of isolating the threats from the connectivity of regular IoT nodes. The simulated outcome of the proposed system shows that it offers a better solution towards security in contrast to existing security approaches frequently exercised in IoT at present