From: http://online.wsj.com/news/articles/SB10001424127887323585604579008620509295960

By ANDREW BLACKMAN Sept. 15, 2013 5:17 p.m. ET

  AuthenTec Inc., a developer of fingerprint-sensor technology,

  Yubico Inc. Like the traditional hardware tokens that generate random numeric passwords and 
  which companies have used for years, the Yubico devices generate temporary passwords to be
  used as a second form of authentication.
  
  But instead of having to read the password off the token and retype it, employees can simply plug
  the token into a USB port or touch it on a mobile device using near-field communication