@inproceedings{ayalon2013retrospective,
  title={Retrospective privacy: Managing longitudinal privacy in online social networks},
  author={Ayalon, Oshrat and Toch, Eran},
  booktitle={Proceedings of the Ninth Symposium on Usable Privacy and Security},
  pages={4},
  year={2013},
  organization={ACM}
}