{"id":"https://openalex.org/W2964177755","doi":"https://doi.org/10.1109/tkde.2019.2930696","title":"Enhanced Privacy Preserving Group Nearest Neighbor Search","display_name":"Enhanced Privacy Preserving Group Nearest Neighbor Search","publication_year":2019,"publication_date":"2019-01-01","ids":{"openalex":"https://openalex.org/W2964177755","doi":"https://doi.org/10.1109/tkde.2019.2930696","mag":"2964177755"},"language":"en","primary_location":{"id":"doi:10.1109/tkde.2019.2930696","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tkde.2019.2930696","pdf_url":null,"source":{"id":"https://openalex.org/S30698027","display_name":"IEEE Transactions on Knowledge and Data Engineering","issn_l":"1041-4347","issn":["1041-4347","1558-2191","2326-3865"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320439","host_organization_name":"IEEE Computer Society","host_organization_lineage":["https://openalex.org/P4310320439","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Computer Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Knowledge and Data Engineering","raw_type":"journal-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/A5101635565","display_name":"Yuncheng Wu","orcid":"https://orcid.org/0000-0002-1436-3916"},"institutions":[{"id":"https://openalex.org/I78988378","display_name":"Renmin University of China","ror":"https://ror.org/041pakw92","country_code":"CN","type":"education","lineage":["https://openalex.org/I78988378"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Yuncheng Wu","raw_affiliation_strings":["School of Information, Renmin University of China, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Information, Renmin University of China, Beijing, China","institution_ids":["https://openalex.org/I78988378"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100360129","display_name":"Ke Wang","orcid":"https://orcid.org/0000-0002-8021-4951"},"institutions":[{"id":"https://openalex.org/I18014758","display_name":"Simon Fraser University","ror":"https://ror.org/0213rcc28","country_code":"CA","type":"education","lineage":["https://openalex.org/I18014758"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Ke Wang","raw_affiliation_strings":["School of Computer Science, Simon Fraser University, Burnaby, BC, Canada"],"affiliations":[{"raw_affiliation_string":"School of Computer Science, Simon Fraser University, Burnaby, BC, Canada","institution_ids":["https://openalex.org/I18014758"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5043702644","display_name":"Ruoyang Guo","orcid":"https://orcid.org/0000-0002-6640-8717"},"institutions":[{"id":"https://openalex.org/I78988378","display_name":"Renmin University of China","ror":"https://ror.org/041pakw92","country_code":"CN","type":"education","lineage":["https://openalex.org/I78988378"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Ruoyang Guo","raw_affiliation_strings":["School of Information, Renmin University of China, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Information, Renmin University of China, Beijing, China","institution_ids":["https://openalex.org/I78988378"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100723116","display_name":"Zhilin Zhang","orcid":"https://orcid.org/0000-0001-5913-4685"},"institutions":[{"id":"https://openalex.org/I18014758","display_name":"Simon Fraser University","ror":"https://ror.org/0213rcc28","country_code":"CA","type":"education","lineage":["https://openalex.org/I18014758"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Zhilin Zhang","raw_affiliation_strings":["School of Computer Science, Simon Fraser University, Burnaby, BC, Canada"],"affiliations":[{"raw_affiliation_string":"School of Computer Science, Simon Fraser University, Burnaby, BC, Canada","institution_ids":["https://openalex.org/I18014758"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021017119","display_name":"Dan Zhao","orcid":"https://orcid.org/0000-0001-5266-6726"},"institutions":[{"id":"https://openalex.org/I78988378","display_name":"Renmin University of China","ror":"https://ror.org/041pakw92","country_code":"CN","type":"education","lineage":["https://openalex.org/I78988378"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Dan Zhao","raw_affiliation_strings":["School of Information, Renmin University of China, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Information, Renmin University of China, Beijing, China","institution_ids":["https://openalex.org/I78988378"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100420391","display_name":"Hong Chen","orcid":"https://orcid.org/0000-0001-8132-9382"},"institutions":[{"id":"https://openalex.org/I78988378","display_name":"Renmin University of China","ror":"https://ror.org/041pakw92","country_code":"CN","type":"education","lineage":["https://openalex.org/I78988378"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Hong Chen","raw_affiliation_strings":["School of Information, Renmin University of China, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Information, Renmin University of China, Beijing, China","institution_ids":["https://openalex.org/I78988378"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100619237","display_name":"Cuiping Li","orcid":"https://orcid.org/0000-0003-0089-1045"},"institutions":[{"id":"https://openalex.org/I78988378","display_name":"Renmin University of China","ror":"https://ror.org/041pakw92","country_code":"CN","type":"education","lineage":["https://openalex.org/I78988378"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Cuiping Li","raw_affiliation_strings":["School of Information, Renmin University of China, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Information, Renmin University of China, Beijing, China","institution_ids":["https://openalex.org/I78988378"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5101635565"],"corresponding_institution_ids":["https://openalex.org/I78988378"],"apc_list":null,"apc_paid":null,"fwci":1.3003,"has_fulltext":false,"cited_by_count":14,"citation_normalized_percentile":{"value":0.85636655,"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":"1","last_page":"1"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10764","display_name":"Privacy-Preserving Technologies in Data","score":0.9994000196456909,"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"}},"topics":[{"id":"https://openalex.org/T10764","display_name":"Privacy-Preserving Technologies in Data","score":0.9994000196456909,"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/T10237","display_name":"Cryptography and Data Security","score":0.9986000061035156,"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/T11498","display_name":"Security in Wireless Sensor Networks","score":0.9805999994277954,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.840492844581604},{"id":"https://openalex.org/keywords/collusion","display_name":"Collusion","score":0.6401506662368774},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.5311191082000732},{"id":"https://openalex.org/keywords/private-information-retrieval","display_name":"Private information retrieval","score":0.5138587951660156},{"id":"https://openalex.org/keywords/service-provider","display_name":"Service provider","score":0.4942188560962677},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.48672226071357727},{"id":"https://openalex.org/keywords/aggregate","display_name":"Aggregate (composite)","score":0.4744214415550232},{"id":"https://openalex.org/keywords/k-nearest-neighbors-algorithm","display_name":"k-nearest neighbors algorithm","score":0.4516323506832123},{"id":"https://openalex.org/keywords/k-anonymity","display_name":"k-anonymity","score":0.417780339717865},{"id":"https://openalex.org/keywords/location-based-service","display_name":"Location-based service","score":0.4124927222728729},{"id":"https://openalex.org/keywords/information-privacy","display_name":"Information privacy","score":0.3983004093170166},{"id":"https://openalex.org/keywords/service","display_name":"Service (business)","score":0.3382493853569031},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.3303946256637573},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.2939767837524414},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.23961302638053894},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.08999615907669067}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.840492844581604},{"id":"https://openalex.org/C2781198186","wikidata":"https://www.wikidata.org/wiki/Q701521","display_name":"Collusion","level":2,"score":0.6401506662368774},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.5311191082000732},{"id":"https://openalex.org/C99221444","wikidata":"https://www.wikidata.org/wiki/Q1532069","display_name":"Private information retrieval","level":2,"score":0.5138587951660156},{"id":"https://openalex.org/C116537","wikidata":"https://www.wikidata.org/wiki/Q2169973","display_name":"Service provider","level":3,"score":0.4942188560962677},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.48672226071357727},{"id":"https://openalex.org/C4679612","wikidata":"https://www.wikidata.org/wiki/Q866298","display_name":"Aggregate (composite)","level":2,"score":0.4744214415550232},{"id":"https://openalex.org/C113238511","wikidata":"https://www.wikidata.org/wiki/Q1071612","display_name":"k-nearest neighbors algorithm","level":2,"score":0.4516323506832123},{"id":"https://openalex.org/C2777706471","wikidata":"https://www.wikidata.org/wiki/Q17061432","display_name":"k-anonymity","level":3,"score":0.417780339717865},{"id":"https://openalex.org/C155292070","wikidata":"https://www.wikidata.org/wiki/Q1198122","display_name":"Location-based service","level":2,"score":0.4124927222728729},{"id":"https://openalex.org/C123201435","wikidata":"https://www.wikidata.org/wiki/Q456632","display_name":"Information privacy","level":2,"score":0.3983004093170166},{"id":"https://openalex.org/C2780378061","wikidata":"https://www.wikidata.org/wiki/Q25351891","display_name":"Service (business)","level":2,"score":0.3382493853569031},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.3303946256637573},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.2939767837524414},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.23961302638053894},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.08999615907669067},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C175444787","wikidata":"https://www.wikidata.org/wiki/Q39072","display_name":"Microeconomics","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0},{"id":"https://openalex.org/C136264566","wikidata":"https://www.wikidata.org/wiki/Q159810","display_name":"Economy","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tkde.2019.2930696","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tkde.2019.2930696","pdf_url":null,"source":{"id":"https://openalex.org/S30698027","display_name":"IEEE Transactions on Knowledge and Data Engineering","issn_l":"1041-4347","issn":["1041-4347","1558-2191","2326-3865"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320439","host_organization_name":"IEEE Computer Society","host_organization_lineage":["https://openalex.org/P4310320439","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Computer Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Knowledge and Data Engineering","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Peace, Justice and strong institutions","score":0.5299999713897705,"id":"https://metadata.un.org/sdg/16"}],"awards":[{"id":"https://openalex.org/G3704501742","display_name":null,"funder_award_id":"61532021","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G586315176","display_name":null,"funder_award_id":"61772536","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G6796705281","display_name":null,"funder_award_id":"61772537","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G8696286034","display_name":null,"funder_award_id":"61702522","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":42,"referenced_works":["https://openalex.org/W1544327602","https://openalex.org/W1562811233","https://openalex.org/W1689932539","https://openalex.org/W1966517804","https://openalex.org/W1981634604","https://openalex.org/W2001347093","https://openalex.org/W2024471472","https://openalex.org/W2041480327","https://openalex.org/W2051847955","https://openalex.org/W2065076704","https://openalex.org/W2067636847","https://openalex.org/W2069388449","https://openalex.org/W2074149673","https://openalex.org/W2075818205","https://openalex.org/W2082894754","https://openalex.org/W2089959302","https://openalex.org/W2095881341","https://openalex.org/W2113808602","https://openalex.org/W2121423622","https://openalex.org/W2128800833","https://openalex.org/W2131796944","https://openalex.org/W2132172731","https://openalex.org/W2136046112","https://openalex.org/W2143709779","https://openalex.org/W2148797863","https://openalex.org/W2150290224","https://openalex.org/W2150447982","https://openalex.org/W2153787007","https://openalex.org/W2157855380","https://openalex.org/W2157956941","https://openalex.org/W2237491325","https://openalex.org/W2267977268","https://openalex.org/W2327993796","https://openalex.org/W2343414189","https://openalex.org/W2616234324","https://openalex.org/W2762786854","https://openalex.org/W2790664939","https://openalex.org/W2795286139","https://openalex.org/W3106047101","https://openalex.org/W3141585064","https://openalex.org/W6673414462","https://openalex.org/W6749308130"],"related_works":["https://openalex.org/W2597098157","https://openalex.org/W3144619778","https://openalex.org/W3123435100","https://openalex.org/W3125502843","https://openalex.org/W3125357796","https://openalex.org/W2623821580","https://openalex.org/W1540218125","https://openalex.org/W1984462879","https://openalex.org/W2350392865","https://openalex.org/W2884799469"],"abstract_inverted_index":{"Group":[0],"k-nearest":[1],"neighbor":[2],"(kGNN)":[3],"search":[4,103],"allows":[5],"a":[6,18,168],"group":[7,118,157],"of":[8,95,125],"n":[9,112],"mobile":[10],"users":[11,82,115],"to":[12,28,98,121,155],"jointly":[13],"retrieve":[14],"k":[15],"points":[16],"from":[17,48,61,71,80],"location-based":[19],"service":[20],"provider":[21],"(LSP)":[22],"that":[23,176],"minimizes":[24],"the":[25,36,51,55,84,99,105,117,123,126,146,162],"aggregate":[26],"distance":[27],"them.":[29],"We":[30,86],"identify":[31],"four":[32],"protection":[33],"objectives":[34],"in":[35,83,104,116,182],"privacy":[37,89,100,148],"preserving":[38,90,101,149],"kGNN":[39,102],"search:":[40],"(i)":[41],"every":[42,74],"user's":[43,75],"location":[44,76,124],"should":[45,58,68,77],"be":[46,59,69,78,152],"protected":[47,60,70,79],"LSP;":[49,62],"(ii)":[50],"group's":[52],"query":[53,56,158,163],"and":[54,172,186],"answer":[57],"(iii)":[63],"LSP's":[64],"private":[65],"database":[66],"information":[67],"users;":[72],"(iv)":[73],"other":[81],"group.":[85],"design":[87],"two":[88,93],"solutions":[91,130,150,178],"under":[92],"types":[94],"threat":[96],"model":[97],"full":[106],"user":[107,187],"collusion":[108],"environment,":[109],"where":[110],"any":[111,156],"-":[113],"1":[114],"may":[119],"collude":[120],"infer":[122],"remaining":[127],"user.":[128],"Our":[129],"do":[131],"not":[132],"rely":[133],"on":[134,137,195],"heavy":[135],"pre-computation":[136],"LSP":[138],"like":[139],"previous":[140],"works.":[141],"Though":[142],"we":[143],"consider":[144],"kGNN,":[145],"proposed":[147],"can":[151],"easily":[153],"adopted":[154],"as":[159,167],"it":[160],"treats":[161],"answering":[164],"(i.e.,":[165],"kGNN)":[166],"black":[169],"box.":[170],"Theoretical":[171],"experimental":[173],"analysis":[174],"suggest":[175],"our":[177],"are":[179],"highly":[180],"efficient":[181],"both":[183],"communication":[184],"cost":[185,189],"computational":[188],"while":[190],"incurring":[191],"some":[192],"reasonable":[193],"overhead":[194],"LSP.":[196]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":2}],"updated_date":"2026-04-05T17:49:38.594831","created_date":"2025-10-10T00:00:00"}
