{"id":"https://openalex.org/W3190197746","doi":"https://doi.org/10.1109/iwcmc51323.2021.9498951","title":"Spatiotemporal Location Differential Privacy for Sparse Mobile Crowdsensing","display_name":"Spatiotemporal Location Differential Privacy for Sparse Mobile Crowdsensing","publication_year":2021,"publication_date":"2021-06-28","ids":{"openalex":"https://openalex.org/W3190197746","doi":"https://doi.org/10.1109/iwcmc51323.2021.9498951","mag":"3190197746"},"language":"en","primary_location":{"id":"doi:10.1109/iwcmc51323.2021.9498951","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iwcmc51323.2021.9498951","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 International Wireless Communications and Mobile Computing (IWCMC)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5072612806","display_name":"Qifan Yang","orcid":"https://orcid.org/0009-0006-5139-3299"},"institutions":[{"id":"https://openalex.org/I27357992","display_name":"Dalian University of Technology","ror":"https://ror.org/023hj5876","country_code":"CN","type":"education","lineage":["https://openalex.org/I27357992"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Qifan Yang","raw_affiliation_strings":["School of Software, Dalian University of Technology, Dalian, China"],"affiliations":[{"raw_affiliation_string":"School of Software, Dalian University of Technology, Dalian, China","institution_ids":["https://openalex.org/I27357992"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5065559740","display_name":"Yuanfang Chen","orcid":"https://orcid.org/0000-0002-1109-8491"},"institutions":[{"id":"https://openalex.org/I50760025","display_name":"Hangzhou Dianzi University","ror":"https://ror.org/0576gt767","country_code":"CN","type":"education","lineage":["https://openalex.org/I50760025"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yuanfang Chen","raw_affiliation_strings":["School of Cyberspace, Hangzhou Dianzi University, Hangzhou, China"],"affiliations":[{"raw_affiliation_string":"School of Cyberspace, Hangzhou Dianzi University, Hangzhou, China","institution_ids":["https://openalex.org/I50760025"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5057916222","display_name":"Mohsen Guizani","orcid":"https://orcid.org/0000-0002-8972-8094"},"institutions":[{"id":"https://openalex.org/I60342839","display_name":"Qatar University","ror":"https://ror.org/00yhnba62","country_code":"QA","type":"education","lineage":["https://openalex.org/I60342839"]}],"countries":["QA"],"is_corresponding":false,"raw_author_name":"Mohsen Guizani","raw_affiliation_strings":["Qatar University, Qatar"],"affiliations":[{"raw_affiliation_string":"Qatar University, Qatar","institution_ids":["https://openalex.org/I60342839"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5060724570","display_name":"Gyu Myoung Lee","orcid":"https://orcid.org/0000-0002-2155-5553"},"institutions":[{"id":"https://openalex.org/I63098007","display_name":"Liverpool John Moores University","ror":"https://ror.org/04zfme737","country_code":"GB","type":"education","lineage":["https://openalex.org/I63098007"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Gyu Myoung Lee","raw_affiliation_strings":["Liverpool John Moores University, UK"],"affiliations":[{"raw_affiliation_string":"Liverpool John Moores University, UK","institution_ids":["https://openalex.org/I63098007"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5072612806"],"corresponding_institution_ids":["https://openalex.org/I27357992"],"apc_list":null,"apc_paid":null,"fwci":2.1092,"has_fulltext":false,"cited_by_count":11,"citation_normalized_percentile":{"value":0.88872009,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"1734","last_page":"1741"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11704","display_name":"Mobile Crowdsensing and Crowdsourcing","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1706","display_name":"Computer Science Applications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11704","display_name":"Mobile Crowdsensing and Crowdsourcing","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1706","display_name":"Computer Science Applications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10764","display_name":"Privacy-Preserving Technologies in Data","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11980","display_name":"Human Mobility and Location-Based Analysis","score":0.9894999861717224,"subfield":{"id":"https://openalex.org/subfields/3313","display_name":"Transportation"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/differential-privacy","display_name":"Differential privacy","score":0.8609238862991333},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8355132937431335},{"id":"https://openalex.org/keywords/dimension","display_name":"Dimension (graph theory)","score":0.5405392646789551},{"id":"https://openalex.org/keywords/information-privacy","display_name":"Information privacy","score":0.535416305065155},{"id":"https://openalex.org/keywords/information-sensitivity","display_name":"Information sensitivity","score":0.502612829208374},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.49540460109710693},{"id":"https://openalex.org/keywords/inference","display_name":"Inference","score":0.4713708162307739},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.27630001306533813},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.2611122727394104}],"concepts":[{"id":"https://openalex.org/C23130292","wikidata":"https://www.wikidata.org/wiki/Q5275358","display_name":"Differential privacy","level":2,"score":0.8609238862991333},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8355132937431335},{"id":"https://openalex.org/C33676613","wikidata":"https://www.wikidata.org/wiki/Q13415176","display_name":"Dimension (graph theory)","level":2,"score":0.5405392646789551},{"id":"https://openalex.org/C123201435","wikidata":"https://www.wikidata.org/wiki/Q456632","display_name":"Information privacy","level":2,"score":0.535416305065155},{"id":"https://openalex.org/C137822555","wikidata":"https://www.wikidata.org/wiki/Q2587068","display_name":"Information sensitivity","level":2,"score":0.502612829208374},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.49540460109710693},{"id":"https://openalex.org/C2776214188","wikidata":"https://www.wikidata.org/wiki/Q408386","display_name":"Inference","level":2,"score":0.4713708162307739},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.27630001306533813},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.2611122727394104},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/iwcmc51323.2021.9498951","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iwcmc51323.2021.9498951","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 International Wireless Communications and Mobile Computing (IWCMC)","raw_type":"proceedings-article"},{"id":"pmh:oai:qspace.qu.edu.qa:10576/36233","is_oa":false,"landing_page_url":"http://hdl.handle.net/10576/36233","pdf_url":null,"source":{"id":"https://openalex.org/S4306400014","display_name":"Qatar University QSpace (Qatar University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I60342839","host_organization_name":"Qatar University","host_organization_lineage":["https://openalex.org/I60342839"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Conference"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Sustainable cities and communities","score":0.8299999833106995,"id":"https://metadata.un.org/sdg/11"}],"awards":[{"id":"https://openalex.org/G8706871074","display_name":null,"funder_award_id":"61802097","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W1993116423","https://openalex.org/W2045487859","https://openalex.org/W2047071281","https://openalex.org/W2069645862","https://openalex.org/W2070784184","https://openalex.org/W2082894754","https://openalex.org/W2083868427","https://openalex.org/W2123820077","https://openalex.org/W2146697949","https://openalex.org/W2156313597","https://openalex.org/W2157861192","https://openalex.org/W2196824873","https://openalex.org/W2381596065","https://openalex.org/W2473808492","https://openalex.org/W2583454074","https://openalex.org/W2604253054","https://openalex.org/W2794925497","https://openalex.org/W2894779347","https://openalex.org/W2898551696","https://openalex.org/W2911978475","https://openalex.org/W2951852279","https://openalex.org/W2957946950","https://openalex.org/W3008550439","https://openalex.org/W3104145140"],"related_works":["https://openalex.org/W2019704260","https://openalex.org/W2900631219","https://openalex.org/W4304208041","https://openalex.org/W4212899026","https://openalex.org/W4390570329","https://openalex.org/W2795052735","https://openalex.org/W2758544064","https://openalex.org/W3010824232","https://openalex.org/W4286750579","https://openalex.org/W3081971900"],"abstract_inverted_index":{"Sparse":[0],"Mobile":[1],"Crowdsensing":[2],"(SparseMCS)":[3],"has":[4],"become":[5],"an":[6,212],"efficient":[7,131],"method":[8],"for":[9],"collecting":[10],"and":[11,74,98,253],"inferring":[12],"sensor":[13],"data":[14,133,163,181,189,207,219],"at":[15],"the":[16,34,37,51,56,90,95,106,111,117,121,137,141,146,152,155,162,177,183,195,223,226,234],"urban":[17],"scale,":[18],"attracting":[19],"many":[20],"researchers'":[21],"attention.":[22],"However,":[23],"there":[24],"is":[25,86,102,143,216,232],"a":[26,76,127,167,188],"risk":[27],"of":[28,116,154,171,225,238],"location":[29,42,48,59,71,78,83,147,179,255],"privacy":[30,69,73,85,101],"being":[31],"leaked":[32],"when":[33,140],"participants":[35],"complete":[36],"task.":[38],"The":[39,114],"existing":[40],"SparseMCS":[41],"privacy-preserving":[43,79,138,148,168],"mechanisms":[44],"focus":[45],"on":[46],"protecting":[47],"information":[49,92,108],"from":[50],"spatial":[52],"dimension":[53],"while":[54],"ignoring":[55],"time":[57,112],"dimension's":[58],"privacy.":[60,256],"To":[61,129],"solve":[62,194],"this":[63],"problem,":[64],"we":[65,135,165,186,193,210],"combine":[66],"spatiotemporal":[67,99,123],"activity":[68,100,124],"with":[70],"differential":[72,84],"propose":[75],"novel":[77],"mechanism.":[80],"More":[81],"specifically,":[82],"used":[87,103],"to":[88,104,160,175,182,205,218,221],"limit":[89],"adversary's":[91,107],"gain":[93,109],"in":[94,110,158],"space":[96],"dimension,":[97],"determine":[105],"dimension.":[113],"combination":[115],"two":[118],"can":[119,249],"protect":[120],"user's":[122],"patterns":[125],"over":[126],"period.":[128],"achieve":[130,250],"sensing":[132,156,180],"collection,":[134],"train":[136],"model":[139,169],"server":[142],"offline.":[144],"Since":[145],"mechanism":[149],"will":[150],"affect":[151],"accuracy":[153,224],"data,":[157],"order":[159],"reduce":[161],"loss,":[164],"design":[166],"consisting":[170],"three":[172],"parts:":[173],"First,":[174],"fit":[176],"original":[178],"confusion":[184,198],"location,":[185],"learned":[187],"adjustment":[190],"function.":[191],"Secondly,":[192],"optimal":[196],"position":[197],"function":[199],"through":[200],"nonlinear":[201],"programming":[202],"that":[203,215],"aims":[204],"minimize":[206],"loss.":[208],"Third,":[209],"use":[211],"inference":[213],"algorithm":[214],"sensitive":[217],"loss":[220],"improve":[222],"final":[227],"inferred":[228],"data.":[229],"Our":[230],"work":[231],"within":[233],"acceptable":[235],"error":[236],"range":[237],"10-":[239],"<sup":[240,244],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[241,245],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">3</sup>":[242],"~10-":[243],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">2</sup>":[246],",":[247],"which":[248],"more":[251],"comprehensive":[252],"stronger":[254]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":4}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}