Batching of Tasks by Users of Pseudonymous Forums: Anonymity Compromise and Protection
Batching of Tasks by Users of Pseudonymous Forums: Anonymity Compromise and Protection
复制标题
假名论坛用户批量任务:匿名妥协与保护
DOI:
10.1145/3579335
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Shah, Nihar B.
中科院分区:
文献类型:
--
作者:
Goldberg, Alexander;Fanti, Giulia;Shah, Nihar B.
There are a number of forums where people participate under pseudonyms. One example is peer review, where the identity of reviewers for any paper is confidential. When participating in these forums, people frequently engage in "batching": executing multiple related tasks (e.g., commenting on multiple papers) at nearly the same time. Our empirical analysis shows that batching is common in two applications we consider -- peer review and Wikipedia edits. In this paper, we identify and address the risk of deanonymization arising from linking batched tasks. To protect against linkage attacks, we take the approach of adding delay to the posting time of batched tasks. We first show that under some natural assumptions, no delay mechanism can provide a meaningful differential privacy guarantee. We therefore propose a "one-sided" formulation of differential privacy for protecting against linkage attacks. We design a mechanism that adds zero-inflated uniform delay to events and show it can preserve privacy. We prove that this noise distribution is in fact optimal in minimizing expected delay among mechanisms adding independent noise to each event, thereby establishing the Pareto frontier of the trade-off between the expected delay for batched and unbatched events. Finally, we conduct a series of experiments on Wikipedia and Bitcoin data that corroborate the practical utility of our algorithm in obfuscating batching without introducing onerous delay to a system.
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DOI:
10.1109/isit50566.2022.9834716
发表时间:
2022-01
期刊:
2022 IEEE International Symposium on Information Theory (ISIT)
影响因子:
--
作者:
Wenxin Ding;Gautam Kamath;Weina Wang;Nihar B. Shah
通讯作者:
Wenxin Ding;Gautam Kamath;Weina Wang;Nihar B. Shah
影响因子:
1.7
作者:
Lee, Carole J.
通讯作者:
Lee, Carole J.
DOI:
10.1007/978-3-642-41136-6_8
发表时间:
2013
期刊:
--
影响因子:
--
作者:
R. C. Williamson
通讯作者:
R. C. Williamson
DOI:
10.48550/arxiv.2207.11315
发表时间:
2022
期刊:
ArXiv
影响因子:
--
作者:
Steven Jecmen;Nihar B. Shah;Fei Fang;Vincent Conitzer
通讯作者:
Vincent Conitzer
DOI:
--
发表时间:
2019
期刊:
AAMAS Conference proceedings
影响因子:
--
作者:
Wang, J;Shah, N
通讯作者:
Shah, N