@techreport{Muaaz_13_MultiChannelAuthentication,
  author = {Muaaz, Muhammad and Mayrhofer, Ren\'e and Findling, Rainhard Dieter},
  institution = {u'smile Josef-Ressel Center, University of Applied
  		  Sciences Upper Austria},
  title = {Multi-Channel Authentication Protocols},
  year = {2013},
  month = sep
}