I downloaded an app, and it allows me access to my external IP address, and my host name. This made me wonder. If someone knew this info, which seems to be a way, possibly, to link up with me, and my cell phone's, activity, online, or during internal system usage, when/if I use it within the vacinity of the person who knows this info, could that person do what I fear, and gain ANY unauthorized data? Consequently, putting my ID in risk of fraud.