PayPal has it: PayPal Security Key
Why don’t PayPal or Skrill use SMS-based login verification—are there technical or regulatory obstacles?
Is two-factor authentication via OTP really making internet and mobile banking safer?1 ansWhy do only certain websites require an extra 3-D Secure authentication step during online payments?1 ansAre banks that offer online banking services required to use two-factor authentication?1 ansHow risky is online banking, and what measures can reduce those risks?1 ans