The inherent weakness of typical mobile device unlocking
		  approaches (PIN, password, graphic pattern) is that they
		  demand time and attention, leading a majority of end users
		  to disable them, effectively lowering device security. We
		  propose a method for unlocking mobile devices by shaking
		  them together, implicitly passing the unlocked state from
		  one device to another. One obvious use case includes a
		  locked mobile phone and a wrist watch, which remains
		  unlocked as long as strapped to the user’s wrist. Shaking
		  both devices together generates a one-time unlocking event
		  for the phone without the user interacting with the screen.
		  We explicitly analyze the usability critical impact of
		  shaking duration with respect to the level of security.
		  Results indicate that unlocking is possible with a true
		  match rate of 0.795 and true non match rate of 0.867 for a
		  shaking duration as short as two seconds.<br>
<br><pre>@inproceedings{Findling_14_ShakeUnlockSecurelyUnlock,
  author = {Findling, Rainhard Dieter and Muaaz, Muhammad and Hintze, Daniel and Mayrhofer, Ren\'e},
  title = { {ShakeUnlock}: Securely Unlock Mobile Devices by Shaking
  		  them Together},
  booktitle = {Proc. {MoMM} 2014: 12th International Conference on
  		  Advances in Mobile Computing and Multimedia},
  year = {2014},
  pages = {165--174},
  address = {New York, NY, USA},
  month = dec,
  publisher = {ACM Press},
  note = { {Winner of the MoMM 2014 best paper award}},
  booktitle_short = {Proc. {MoMM} 2014},
  day = {8--10},
  documenturl = {http://www.mayrhofer.eu.org/downloads/publications/MoMM2014-Shake-Unlock-on-Wrist.pdf},
  doi = {10.1145/2684103.2684122},
  eventurl = {http://www.iiwas.org/conferences/momm2014/},
  isbn = {978-1-4503-3008-4},
  keywords = {accelerometer; authentication; frequency domain; mobile
  		  devices; shaking; time series analysis; usability;},
  location = {Kaohsiung, Taiwan},
  pubtype = {conference}
}
</pre>