Sales professionals bypassing lengthy airport passport controls by signing up for the iris-scanning service could soon be consigned to a happy memory now that scientists have found ways to trick the system.
The BBC has reported that security researchers have discovered a way to replicate a person's eye to fool iris-scanning security device.
A team at the Universidad Autonoma de Madrid was able to recreate the image of an iris from digital codes of real irises stored in security databases.
The findings were shared at the annual Black Hat security conference in Las Vegas.
It raises doubts over what is considered to be one of the most secure methods of biometric security.
Researcher Javier Galbally and his team, which included researchers from West Virginia University, were able to print out synthetic images of irises.
In one experiment, the researchers tested their fake irises against a leading commercial-recognition system. In 80% of attempts, they said, the scanner believed it was a real eye.
While researchers have been able to create realistic iris images for some time, it is thought that this is the first instance where the fake image can be generated from the iris code of a real person - a method which could be used to steal someone's identity.
An iris code is the data stored by recognition systems when it scans a person's eye. It contains around 5,000 different pieces of information.