Create the security system for Wireless Sensors

I need to create a unique address which helps me to communicate my smartphone with the server which is further receiving the data from wireless mesh network through Wireless Temperature sensor We are going to place these sensors in building basements as well as ducts, Resturant food preservation store. I need some suggestion which while connecting the receivers especially from these sensors with Raspberry Pi how can I further notify the message by using unique addresses?

Any leads will be grateful.