> How is the transport medium changing anything?

it's mostly about efficiency. IR based, an employee needs to physically walk around. RF based, place a transmitter or two in the building and the system now works fully automated.

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master-lincoln an hour ago | parent [-]

Sorry about not being explicit. I meant how it changes anything security-wise.

With the same vulnerable protocol the RF system is as easy to attack with bigger consequences then it seems....

	▲	rickdeckard an hour ago \| parent [-]
		The RF system doesn't use the same protocol, it's a new protocol (to potentially hack and reverse-engineer). The early shelf-label systems were IR-based, sold in bulk and were programmed manually using handheld devices held against them. Most shelf-label solutions of today are part of a service-model, where gateways are mounted in the store to wirelessly update any label on price-change, often orchestrated remotely so store-chains can update all shops simultaneously.