http://m.economictimes.com/small-biz/startups/paytm-to-use-aadhaar-based-client-authentication-system-for-its-payment-bank/articleshow/54285406.cms?intenttarget=no&utm_source=newsletter&utm_medium=email&utm_campaign=IACC&type=iaccnewsletter Paytm to use Aadhaar-based client-authentication system for its payment bank - The Economic Times on Mobile