Hi all I'm programming a dashboard in node red in raspberryand I would like to open it on touch screen at startup. In particular I don't want users see the node red code. For these reason I would add a password too to access and create a sorto of license to SD to avoid copy and incorrect use
You can use an app such as Automate or Tasker to do that.
Do you mean you want to encrypt the SD card so it cannot be accessed without a password? I don't know if that is possible on a pi. Again it is not a node red question, try Google.
Sounds like some form of kiosk mode would do the trick, and prevent the user from exiting the Dashboard to get at anything else.