The password by itself actually is a pretty good tool. It is simple to use, easy to implement and can be reasonably strong. The problem is one of scale. For a user juggling passwords for multiple accounts and for administrators juggling many users, the system quickly becomes unwieldy, and strong security begins to break down. In addition, the steady growth in computing power erodes password security by making dictionary and brute force attacks more practical.See also:
Biometrics – the use of physical traits such as fingerprints, irises, faces or voices to identify persons – is more complex, but is becoming more practical. It offers the promise of better security based on the premise that there is only one you.
Yet it has its drawbacks...
January 17, 2012 More on the Awesomeness of Passwords