This type of technology is not as mundane as it sounds.  The concept is based off of the current password or PIN system, but adds an extra dimension of keystroke dynamics.  Not only must an intruder know the correct password using this technology, but they must also be able to replicate the rate of typing and intervals between letters to gain access to the information.  It is most likely that, even if an unauthorized person is able to guess the correct password, they will not be able to type it with the proper rhythm unless they have had the ability to hear and memorize the correct users key strokes.

    This is most likely one of the least secure of the new biometric technologies that has evolved in recent years, however, it is also probably one of the cheapest and easiest to implement.  It will most likely not gain much attention for use in electronic commerce since other systems can be purchased for about the same amount and offer far more reliability.