Mobile authentication company Payfone closed a $23.5 million round of funding today. BlueCross BlueShield Venture Partners and Andrew Prozes led the round, while new investors Strauss Zelnick, Maclab Development Group and Transaction Network Services, along with existing investors RRE Ventures, Opus Capital, Relay Ventures, Early Warning Services, American Express Ventures, Verizon Ventures, and Rogers Venture Partners also contributed.

This Series E round brings the New York-based company’s total funding to just over $66 million and bolsters Payfone’s Board of Directors with the addition of Mike Spadafore of Sandbox Industries and Andrew Prozes, the former CEO of LexisNexis.

When it launched in 2008, Payfone sought to fight the mobile payments battle but pivoted just over 3 years ago to focus on mobile authentication solutions. In its former life as a payments company, Payfone launched 1 Touch Checkout at FinovateFall 2012 in New York. Today, the company offers a non-intrusive authentication option for end clients that uses the identity of their mobile phone to offer persistent protection against fraud.

At the 2015 Fierce Innovation Awards, Payfone won the Over-the-Top (OTT) Monetization and Customer Security categories. In 2016, the company deployed its technology at a Tier-1 bank in the U.S., marking 50 million bank accounts protected by Payfone.