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Utility Analysis and Enhancement of LDP Mechanisms in High-Dimensional Space. (arXiv:2201.07469v1 [cs.CR])
Jan. 20, 2022, 2:20 a.m. | Jiawei Duan, Qingqing Ye, Haibo Hu
cs.CR updates on arXiv.org arxiv.org
Local differential privacy (LDP), which perturbs the data of each user
locally and only sends the noisy version of her information to the aggregator,
is a popular privacy-preserving data collection mechanism. In LDP, the data
collector could obtain accurate statistics without access to original data,
thus guaranteeing privacy. However, a primary drawback of LDP is its
disappointing utility in high-dimensional space. Although various LDP schemes
have been proposed to reduce perturbation, they share the same and naive
aggregation mechanism at …
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