US Patent 6895514 Method and apparatus for achieving secure password access

A method and apparatus for enhancing the security of password security systems. The authorization decision related to passwords is based not only on entry of the correct characters in the correct sequence but also on the keystroke sequence timing associated with the typing habits of an authorized user. The keystroke sequence timing provides an additional security measure to each password similar to signature or fingerprint systems. Particularly, each person has a unique typing style and this uniqueness is captured in the present invention as keystroke sequence timing and used as an additional recognition means.