Forscher haben den Computervision-Algorithmus eines Iris-Scanners darauf trainiert, lebende von toten Augen zu unterscheiden, um Hacks wie im 1992er Demolition Man zu erkennen, in dem Wesley Snipes einem Wärter das Auge ausschneidet, um damit aus dem Gefängnis zu fliehen.
Technology Review: Iris scanner can distinguish dead eyeballs from living ones
Last year, hackers unlocked an iris-scanning Samsung smartphone by printing an image of the owner’s iris onto a contact lens and then placing the contact lens onto a dummy eyeball. The more gruesome hack from Demolition Man is another way to circumvent these systems. But nobody has worked out whether this form of attack can be detected, until now.
The research is made possible by an unusual database—the Warsaw BioBase PostMortem Iris dataset, which includes 574 near-infrared iris images collected from 17 people at various times after they have died. The images date from five hours to 34 days after death. The team also collected 256 images of live irises. They took care to use the same iris camera used on the cadavers so that the machine-learning algorithm couldn’t be fooled into recognizing images based on the characteristics of different cameras. […]
The results suggest that the algorithm accurately spots all dead irises and rarely misclassifies live ones. “No post-mortem sample gets mistakenly classified as a live one, with a probability of misclassifying a live sample as a dead one being around 1 percent,” says the team.