Due to flaws in present access-control mechanisms, computers and sensitive data networks are the most vulnerable to intrusions. Hacking software can quickly crack passwords, and keycards may be shared...

Due to flaws in present access-control mechanisms, computers and sensitive data networks are the most vulnerable to intrusions. Hacking software can quickly crack passwords, and keycards may be shared by several persons. Keys are nearly as old as the locks to which they are fitted. How might biometrics help with these issues?