Los Angeles-based TeleSign, the provider of phone authentication services used to reduce fraud and spam with web services, said Tuesday that it has named Max Powers as its Vice President, Client Services. Powers joins the company from Vantage Media, where she was GM of the Education Division. Powers also has served at Microsoft and FrontBridge. Powers served at FrontBridge when TeleSign CEO Steve Jillings was CEO of the firm. TeleSign provides phone-based verification systems, which are used as an additional layer of security for web-based logon, e-commerce, and other functionality, by many major Internet services. TeleSign has been quietly growing, and apparently quite quickly, based on growth numbers disclosed last October in the Deloitte Fast 500 awards. The firm reported 15,558% revenue growth between 2006 and 2010 at those awards.