@inproceedings {272216, author = {Changhui Hu and Jin Li and Zheli Liu and Xiaojie Guo and Yu Wei and Xuan Guang and Grigorios Loukides and Changyu Dong}, title = {How to Make Private Distributed Cardinality Estimation Practical, and Get Differential Privacy for Free}, booktitle = {30th USENIX Security Symposium (USENIX Security 21)}, year = {2021}, isbn = {978-1-939133-24-3}, pages = {965--982}, url = {https://www.usenix.org/conference/usenixsecurity21/presentation/hu-changhui}, publisher = {USENIX Association}, month = aug }