I have multiple devices connected to a router, including my phone. The router has no internet; therefore, the network only works locally. All nodes can talk with each other thanks to the router. I use my phone to send messages to the nodes.
If no one has access to the WiFi password will it be possible for someone to sniff the udp messages that I send over the network? If I host a small website in that enclosed network will HTTP traffic be secure? Will you guys recommend using HTTPS even though I am the only one that will use the network?
Pretend that if instead of using wifi, the network is wired. If I were to read the 0s and 1s from a cable, will the messages be encrypted even though they are simple HTTP requests?