  This paper presents a payload security model to maintain the standards of TLS
whilst removing obstacles associated with constrained devices and IoT network
protocols. The domain of aquaponics as a smart-farming environment was used to
test the novelty with ESP32 edge devices. The impact of privacy on message
content illustrated the most appropriate security attribute configurations,
followed by time and power analysis to calculate energy consumptions of each
scenario. It was concluded that using this tailored payload security model
rather than TLS was capable of extending the battery life of constrained
devices by up to 81%, whilst maintaining TLS security standards, and applicable
to various protocols.
