Biometrics: The future of online security?
20 September 2012 Last updated at 07:58 BST
With hackers finding ever more creative ways to circumvent traditional online security steps, the market for biometric systems is growing.
Passwords - even when used correctly - can be easily forgotten by users, or bypassed by hackers with a few personal details and a phone call to the relevant company.
But a number of biometric systems have been developed which use facial or voice recognition to try to ensure that only the genuine account holder can access their private information.
PM's Neil Bowdler reports.