Fingerprint authentication has become the go-to technology for Apple and Samsung devices. But there are a host of other biometrics, from eyeball scans to voice and facial recognition, which are competing to become the dominant security method in the financial-services industry. Security experts agree that biometrics will play a crucial role in replacing passwords in everything from brokerages to bank accounts. The question is which technology will prove to be the best. John Gunn, vice president at Vasco Data Security in Chicago said, ‘Fingerprints are the easiest method today, but all of these methods will grow as banks utilize multiple authentication techniques to achieve higher levels of security.’ Experts acknowledge that swiping a finger is straightforward and easy to do. However, there just are many times when fingerprints will fail. Perspiration on a finger produces false readings. As well as when a finger is cold.