@inproceedings {SSLS11,
  booktitle = {Privacy and Security in Pervasive Environments (PSPAE)}, 
  author    = {Scheffler, Thomas and Schindler, Sven and Lewerenz, Marcus and Schnor, Bettina},
  title     = {{A Privacy-Aware Localization Service for Healthcare Environments}}, 
  address   = {Kreta}, 
  year      = {2011} 
}