What if want to use user authentication to protect my page(s) in addition to BrowserKey?
User authentication technology (such as username/password authentication technology) can be used along with and in addition to BrowserKey, should the developer choose to do so. Many developers choose to so this, but it is certainly not required. BrowserKey provides strong authentication without the need to manage a database of usernames and passwords, one of the many advantages BrowserKey has over most user authentication systems.