Method Function mechanism Advantages Disadvantages
Finger print Difference between human finger prints Very low error rate, being used for over 10 years Dirty or damaged fingers can affect accuracy
Iris Using laser or infrared beam Very reliable with low error rate Members phobia to expose eyes to light
Facial Using face expressions and physical measures Simply accepted by users Not much accurate due to changing facial expressions
Retina Imaging of retina Very reliable with low error rate Members phobia to expose eyes to light
Table 2: Comparison of various Biometric methods used in cloud computing.