So you think you can secure your mobile phone with a fingerprint?

No two people are believed to have identical fingerprints, but researchers have found that partial similarities between prints are common enough that the fingerprint-based security systems used in electronic devices can be more vulnerable than previously thought. The vulnerability lies in the fact that fingerprint-based authentication systems feature small sensors that store partial fingerprints. The researchers found there could be enough similarities among different people's partial prints that one could create a 'MasterPrint.'