To cite diffpriv in publications use:

Rubinstein BIP, Alda F (2017). “Pain-Free Random Differential Privacy with Sensitivity Sampling.” In 34th International Conference on Machine Learning (ICML'2017).

Corresponding BibTeX entry:

  @InProceedings{,
    title = {Pain-Free Random Differential Privacy with Sensitivity
      Sampling},
    author = {Benjamin I. P. Rubinstein and Francesco Alda},
    year = {2017},
    booktitle = {34th International Conference on Machine Learning
      (ICML'2017)},
  }