@inproceedings{rubio2013supporting,
  title={Supporting secure collaborations with attribute-based access control},
  author={Rubio-Medrano, Carlos E and D'Souza, Clinton and Ahn, Gail-Joon},
  booktitle={Collaborative Computing: Networking, Applications and Worksharing (Collaboratecom), 2013 9th International Conference Conference on},
  pages={525--530},
  year={2013},
  organization={IEEE}
}