@inproceedings{GreschbachKB12_MetadataPrivacyDecentralisedOnlineSocialNetworks,
  author    = {Benjamin Greschbach and
               Gunnar Kreitz and
               Sonja Buchegger},
  title     = {The devil is in the metadata -- New privacy challenges in
               Decentralised Online Social Networks},
  booktitle = {Pervasive Computing and Communications, 10th Annual IEEE 
               International Conference, PerCom 2012, Lugano, 
               Switzerland, March 19-23, 2012. Workshop Proceedings},
  isbn      = {978-1-4673-0905-9},
  publisher = {IEEE},
  year      = {2012},
  pages     = {333-339},
  doi       = {10.1109/PerComW.2012.6197506}
}