The use of irises to identify airline passengers is actually not new. Why is iris scanning better than other biologically-based ways of identifying fakes, such as fingerprints and face recognition? To put it this way, iris scanning, like all recognition technology, must strike a balance between allowing the wrong person through and stopping the right one. Therefore, the system needs to find as much as possible point of comparison in order to reduce the probability of the first kind of circumstance happening - will imposter wrong considered legitimate users and made him pass smoothly, but also ensure these comparisons are as unique as possible, in order to reduce the chances of getting the latter - misinterpreted as a legitimate user imposter.
Which of the following does not belong to the passage?
Iris recognition technology is already being used to identify airline passengers