Bibtex Entry:

@inproceedings{popa2011privacy,
   author =       "Raluca Ada Popa and Andrew Blumberg and Hari Balakrishnan and Frank Li",
   title =        "{Privacy and Accountability for Location-Based Aggregate Statistics}",
   booktitle =    {18th ACM Conference on Computer and Communications Security (CCS)},
   year =         {2011},
   month =        {October},
   address =      {Chicago, IL}
}