Preshared one time pad would be pretty simple. But just because it has wifi, doesn't mean you have to use it. The chip is bristling with io so running real wires is always an option (and hey, you probably have to power it by wires anyway).
There's definitely something to be said for not having the surface area of some hobbiest-grade linux distro on your door locks also. I'd like to perform a "security update" on my door locks just about never.
Anyway, the esp32 has a tls stack which is adequate if you want to go that way. Lately there are a handful of boards on the market that pair the esp32 with a PoE chip that are becoming my goto for little "iot" projects.
There's definitely something to be said for not having the surface area of some hobbiest-grade linux distro on your door locks also. I'd like to perform a "security update" on my door locks just about never.
Anyway, the esp32 has a tls stack which is adequate if you want to go that way. Lately there are a handful of boards on the market that pair the esp32 with a PoE chip that are becoming my goto for little "iot" projects.