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In this paper, we propose a modular security approach using 

a positioning security engine featuring GPS location features that can 

uniquely identify the IoT user device. We propose the modular security 

scheme to reinforce the security and viability of IoT-centric solutions for 

various innovative applications, including IoT Mobile payment, Smart city 

heterogeneous networks, communication services, safety, and locationbased services integration. To achieve our goal of securitization and