There are a number of methods described that are intended to limit log-ins exclusively to authorized users.The only method that is foolproof is the biometric devices.

Question

Quizplus · Accepted Answer

While biometric devices are very reliable, they are not 100% foolproof as there is always a possibility of false positives or false negatives. Other methods, such as strong passwords and two-factor authentication, can also be used to limit log-ins to authorized users.

There Are a Number of Methods Described That Are Intended