Secure communication with NodeMCU?

[Cor]

Hi,
is it possible to secure the communication when using the NodeMCU? I am not an expert in this field but I have a feeling that it could be wise to do so.

regards, Cor

[Michael McSharry]

Not clear what you mean by secure. There Arduino libraries for https vs. http communication. Just select the desired library when you do your sketch.

[Cor]

With secure I mean indeed encrypted communication, sorry for not beeing clear. If it is that simple, by changinjg a library, why not doing so by default?
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Cor

[Michael McSharry]

Look at video 232 from Andreas Spiess for a good overview

[Cor]

Great video, thanks for the hint.

[januszczyk]

Note that https requires significant CPU to setup the encryption link. I saw some numbers that show on Arduino it takes 2-5 seconds of compute just to establish the SSL session. Depending upon your use case you might choose to use symmetric encryption with a shared key since it will permit significantly faster session setup.