Password Help

I am trying to create a startup program for my terminals and I want to have it so I when I type it only shows * for each letter I use and I also want it so that ctrl t wont work on the program.

So what would I write.

Instead of using read(), use read("*") and to make no CTRL+T add this at the top of your program:

function os.pullEvent()
 return os.pullEventRaw()
end