TeleSign, a developer of mobile identity verification technology, announced Wednesday it had raised $9 million from Telstra, Australia’s largest provider of telecommunications services.

The investment brings the Marina del Rey company’s total Series B funding round to $49 million. TeleSign raised $40 million in April, a round led by Adams Street Partners with support from March Capital Partners and existing investor Summit Partners.

TeleSign, which develops software that helps Web and mobile companies detect fraud and prevent identity theft, said it has protected 3.5 billion accounts in more than 200 countries. Chief Executive Steve Jillings said the partnership with Telstra will further facilitate the security company’s growth into the Asia Pacific market.

“We’ve doubled revenue every year for the last four years and with a host of new products being readied for launch, we expect that growth to continue,” Jillings said in a statement. “The Telstra investment gives us additional resources to innovate even faster and continue our global expansion as we move toward our goal of an IPO.”

Staff reporter Melissah Yang can be reached at [email protected]. Follow her on Twitter @MelissahYang for the latest in L.A. tech news.