National Australia Bank has announced plans to roll out a security system based on voice biometrics for its telephone banking service.After first experimenting with the technology in 2009, NAB has quietly enrolled 140,000 customers to trial its system. Essentially, the system authenticates the identity of a person calling into NAB's contact centre by matching the person's voice against a voice print captured during the enrolment process.NAB claims the technology can save three minutes per phone call, and that it is three times as secure as fingerprint authentication. The bank will now introduce the system to underpin all phone banking.The bank has no firm plans to extend the use of voice biometrics to ensure smartphone access to internet banking is also secure, even though 40 per cent of all log-ons to its internet banking system now come from mobile devices.However, NAB will shortly roll out a mobile device version of NabConnect, its internet portal for NAB corporate and business clients.At a technology briefing held in Sydney yesterday, the bank also revealed that it plans to roll out a new service called CRM on Demand in early 2013. This customer relationship management system will not only provide NAB's business bankers with a window into clients' business banking data but will also provide insights concerning their personal and wealth management information.This is the first time that business bankers will have had access to a comprehensive single view of their customers' business, private and wealth management relationship with the NAB and its various divisions.The latest moves are part of an ongoing technology transformation at the bank which will see it replace its legacy core banking system with the NextGen platform, which has been developed in association with Oracle, and adopt cloud computing, so as to use only the computing resources it needs.In the last financial year, the bank spent A$524 million on computer equipment and software, up from $428 million the year before.Gavin Slater, NAB's group executive for group business services, said NAB was "spending more than we invested in the past - but that is allowing us to drive productivity gains."At the same time, technology investment was reducing the bank's risk exposure, he said."Everything we are doing better enables us to be Basel III compliant."Slater said the bank would also roll out a second phase of the programme, which would "give us an enhanced ability to support regulatory reporting around risk-weighted assets."