The U.S. Treasury Department is rolling out a dual-factor authentication scheme to better secure its popular online service. Treasury Direct lets businesses and consumers buy and sell Treasury Bills, Treasury Notes, Securities, and Savings Bonds online. Unlike a traditional financial institution, the agency could not charge its customers to recoup the cost of the new product. Users receive Bingo-like cards with thousands of passwords on them, making it tough for hackers to crack. The agency is phasing in user deployment — with the initial focus on its largest customers.”]