Here's a breakdown of how your information is used and/or collected by The Typist (bottom line: we try to be pretty good about these kind of things).
Information We Collect
The Typist stores a list of all tests that you've run using the app, as well as your settings. This information is stored locally on your device, and never transmitted to an outside source.
Information You Share
There is no way to share data through The Typist.
The Typist doesn't store anything that would require extra security.