{"language":[{"iso":"eng"}],"author":[{"full_name":"Henzinger, Monika H","id":"540c9bbd-f2de-11ec-812d-d04a5be85630","first_name":"Monika H","last_name":"Henzinger","orcid":"0000-0002-5008-6530"},{"last_name":"Sricharan","first_name":"A. R.","full_name":"Sricharan, A. R."},{"last_name":"Steiner","first_name":"Teresa Anna","full_name":"Steiner, Teresa Anna"}],"month":"09","date_published":"2024-09-16T00:00:00Z","citation":{"ama":"Henzinger MH, Sricharan AR, Steiner TA. Private counting of distinct elements in the turnstile model and extensions. In: <i>International Conference on Approximation Algorithms for Combinatorial Optimization Problems </i>. Vol 317. Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2024. doi:<a href=\"https://doi.org/10.4230/LIPIcs.APPROX/RANDOM.2024.40\">10.4230/LIPIcs.APPROX/RANDOM.2024.40</a>","chicago":"Henzinger, Monika H, A. R. Sricharan, and Teresa Anna Steiner. “Private Counting of Distinct Elements in the Turnstile Model and Extensions.” In <i>International Conference on Approximation Algorithms for Combinatorial Optimization Problems </i>, Vol. 317. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2024. <a href=\"https://doi.org/10.4230/LIPIcs.APPROX/RANDOM.2024.40\">https://doi.org/10.4230/LIPIcs.APPROX/RANDOM.2024.40</a>.","short":"M.H. Henzinger, A.R. Sricharan, T.A. Steiner, in:, International Conference on Approximation Algorithms for Combinatorial Optimization Problems , Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2024.","ieee":"M. H. Henzinger, A. R. Sricharan, and T. A. Steiner, “Private counting of distinct elements in the turnstile model and extensions,” in <i>International Conference on Approximation Algorithms for Combinatorial Optimization Problems </i>, London, United Kingdom, 2024, vol. 317.","ista":"Henzinger MH, Sricharan AR, Steiner TA. 2024. Private counting of distinct elements in the turnstile model and extensions. International Conference on Approximation Algorithms for Combinatorial Optimization Problems . APPROX: Conference on Approximation Algorithms for Combinatorial Optimization Problems, LIPIcs, vol. 317, 40.","mla":"Henzinger, Monika H., et al. “Private Counting of Distinct Elements in the Turnstile Model and Extensions.” <i>International Conference on Approximation Algorithms for Combinatorial Optimization Problems </i>, vol. 317, 40, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2024, doi:<a href=\"https://doi.org/10.4230/LIPIcs.APPROX/RANDOM.2024.40\">10.4230/LIPIcs.APPROX/RANDOM.2024.40</a>.","apa":"Henzinger, M. H., Sricharan, A. R., &#38; Steiner, T. A. (2024). Private counting of distinct elements in the turnstile model and extensions. In <i>International Conference on Approximation Algorithms for Combinatorial Optimization Problems </i> (Vol. 317). London, United Kingdom: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.APPROX/RANDOM.2024.40\">https://doi.org/10.4230/LIPIcs.APPROX/RANDOM.2024.40</a>"},"status":"public","publication_status":"published","title":"Private counting of distinct elements in the turnstile model and extensions","_id":"18156","article_processing_charge":"No","date_updated":"2024-10-01T10:08:23Z","abstract":[{"lang":"eng","text":"Privately counting distinct elements in a stream is a fundamental data analysis problem with many applications in machine learning. In the turnstile model, Jain et al. [NeurIPS2023] initiated the study of this problem parameterized by the maximum flippancy of any element, i.e., the number of times that the count of an element changes from 0 to above 0 or vice versa. They give an item-level (ε,δ)-differentially private algorithm whose additive error is tight with respect to that parameterization. In this work, we show that a very simple algorithm based on the sparse vector technique achieves a tight additive error for item-level (ε,δ)-differential privacy and item-level ε-differential privacy with regards to a different parameterization, namely the sum of all flippancies. Our second result is a bound which shows that for a large class of algorithms, including all existing differentially private algorithms for this problem, the lower bound from item-level differential privacy extends to event-level differential privacy. This partially answers an open question by Jain et al. [NeurIPS2023]."}],"external_id":{"arxiv":["2408.11637"]},"scopus_import":"1","ec_funded":1,"article_number":"40","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"corr_author":"1","year":"2024","publication":"International Conference on Approximation Algorithms for Combinatorial Optimization Problems ","publisher":"Schloss Dagstuhl - Leibniz-Zentrum für Informatik","day":"16","department":[{"_id":"MoHe"}],"doi":"10.4230/LIPIcs.APPROX/RANDOM.2024.40","oa_version":"Published Version","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","file_date_updated":"2024-10-01T10:07:14Z","acknowledgement":"Monika Henzinger: This project has received funding from the European Research Council\r\n(ERC) under the European Union’s Horizon 2020 research and innovation programme (MoDynStruct,No. 101019564) and the Austrian Science Fund (FWF) grant DOI 10.55776/Z422, grant DOI 10.55776/I5982, and grant DOI 10.55776/P33775 with additional funding from the netidee SCIENCE Stiftung, 2020–2024.\r\nTeresa Anna Steiner: Supported by a research grant (VIL51463) from VILLUM FONDEN.","project":[{"grant_number":"101019564","name":"The design and evaluation of modern fully dynamic data structures","_id":"bd9ca328-d553-11ed-ba76-dc4f890cfe62","call_identifier":"H2020"},{"grant_number":"Z00422","name":"Wittgenstein Award - Monika Henzinger","_id":"34def286-11ca-11ed-8bc3-da5948e1613c"},{"name":"Static and Dynamic Hierarchical Graph Decompositions","grant_number":"I05982","_id":"bda196b2-d553-11ed-ba76-8e8ee6c21103"},{"grant_number":"P33775 ","name":"Fast Algorithms for a Reactive Network Layer","_id":"bd9e3a2e-d553-11ed-ba76-8aa684ce17fe"}],"alternative_title":["LIPIcs"],"intvolume":"       317","date_created":"2024-09-29T22:01:38Z","type":"conference","ddc":["000"],"conference":{"end_date":"2024-08-30","start_date":"2024-08-27","name":"APPROX: Conference on Approximation Algorithms for Combinatorial Optimization Problems","location":"London, United Kingdom"},"volume":317,"oa":1,"quality_controlled":"1","has_accepted_license":"1","file":[{"creator":"dernst","file_id":"18166","checksum":"c08b41c896e4d8c69570044808b40e0b","file_size":973917,"file_name":"2024_LIPICs_HenzingerM.pdf","content_type":"application/pdf","date_created":"2024-10-01T10:07:14Z","success":1,"relation":"main_file","access_level":"open_access","date_updated":"2024-10-01T10:07:14Z"}],"publication_identifier":{"issn":["1868-8969"],"isbn":["9783959773485"]}}