Entrust technology fits the bill at Vodafone

Companies can monitor their mobile billing and other administrative information through a secure getAccess system on Vodafone's corporate website. The access technology allows companies to tailor their requirements for the portal by either using single sign-on, hardware token or a public key infrastructure.

Andrew Armstrong, VP for Northern Europe at Entrust, said: "Companies can integrate their billing monitoring with their existing corporate portal. It will allow the company to carry out self-service transactions through one interface."

Tom Fawcett, security analyst at Frost and Sullivan said: "Accessing billing information through a corporate portal will be on the increase as most companies now offer mobile phones to employees. Also the majority of mobile operators are looking into partnering with security companies in order to enhance their services."

The companies estimate the service will be accessed by 550,000 of Vodafone's customers.