It's pretty much impossible to keep any secrets like that here. It's just too communal of a society, and whether you like it or not, everyone within about a 3km radius is going to know the basics of you, and what you're up to. Can't do anything or go anywhere without everyone finding out.
Takes a while to get used to, but I actually love it. Works great for someone like me who likes to isolate himself, because it's really tough to do that here.