@inproceedings{2019a,
  author = "P. Schoppmann and A. Gascón and M. Raykova and B. Pinkas",
  title = "Make Some ROOM for the Zeros: Data Sparsity in Secure Distributed Machine Learning",
  year = 2019,
  booktitle = "ACM Conference on Computer and Communications Security (CCS '19)",
  publisher = "ACM",
  doi = "10.1145/3319535.3339816",
  url = "https://eprint.iacr.org/2019/281.pdf"
}