Data Insertion Protection?

[eluser]vitoco[/eluser]
I think that if you only have the hability to send data, you can first "uglify" the url as much as posible ( c0239402348023/m9827342349/0283490283094/.../ ) , and second , send a unique hash or several unique not-human-readeable params, from every "valid user" ( in this case the arduino ) to validate it, also you can check the ip of the request. Not an infalible solution, but it makes more difficult.

Saludos