American Express has bought mobile device authentication company InAuth for an undisclosed amount, giving an exit to its corporate venturing unit.

American Express Ventures has exited US-based mobile device authentication technology developer InAuth through an acquisition of undisclosed size by its parent company, payment services firm American Express.

Founded in 2011, InAuth provides an authentication system for mobile devices that includes device identification, risk detection and analysis.

American Express, which is already an InAuth customer, will add the company’s technology to its existing data analytics and fraud prevention offering. It already supplies InAuth’s services to customers through its Accertify subsidiary.

American…