Acknowledgements
The authors want to thank Dzmitry Huba, Hubert Eichner, Kallista Bonawitz, Mark Simborg, Peter Kairouz, Prem Eruvbetine, Sarah de Haas for his or her intensive suggestions and modifying on the weblog submit itself, and the groups at Google that helped with algorithm design, infrastructure implementation, and manufacturing upkeep. Particularly, we want to thank the collaborators who straight contributed to this effort: Adria Gascon, Albert Cheu, Allie Culp, Andri Saar, Artem Lagzdin, Brendan McMahan, Brett McLarnon, Chloé Kiddon, Chunxiang Zheng, Conrad Grobler, Edo Roth, Emily Glanz, Ernesto Ocampo, Grace Ni, Haicheng Solar, Ivan Petrov, Jeremy Gillula, Jianpeng Hou, Joe Woodworth, Juliette Pluto, Katharine Daly, Katsiaryna Naliuka, Marco Gruteser, Maya Spivak, Mira Holford, Nova Fallen, Octavian Suciu, Rakshita Tandon, Shumin Zhai, Stanislav Chiknavaryan, Stefan Dierauf, Steve He, Tiziano Santoro, Tom Binder, Ulyana Kurylo, Wei Huang, Yanxiang Zhang, Yu Xiao, Yuanbo Zhang, Zachary Charles, Zheng Xu, Zhimin Yao, and Zoe Gong. This work was supported by Corinna Cortes, 4 Flynn, Blaise Aguera y Arcas, and Yossi Matias.