Hey guys, I have some ideas in my mind and would like to know if someone has an idea or already experience with this.
I would like to connect some arduinos to the mirror wireless e.g. to open garage door, weather station, etc.
For this I found http://www.digi.com/lp/xbee, but I’m not sure how to protect the communication properly.
If I would send a command like “Open Garage” as plain text and not encrypted, everyone could read that and send this command to my arduino as well and no one wants other people to be able to open their garage. But even when I send the command encrypted everyone could read the encrypted message and send this anytime to my garage door as well :(
My question is now: what is a good approach to communicate secure? pairing? encryption? something else?