Trusted user authentication is becoming an increasingly important function in a web-enabled world. The effect of an unsecure authentication system in a corporate or enterprise environment can be prosperous and can include dropping of confidential information, rejection of service, and compromise of data integrity. The value of trusted user authentication is not limited to computer or network access. Many other applications in daily life also require user authentication, such as banking, e-commerce, and can benefit from physical access control and enhanced security to computer resources.