{"id":"https://openalex.org/W4412627858","doi":"https://doi.org/10.1145/3749990","title":"Cross-User Federated Recommendation Unlearning","display_name":"Cross-User Federated Recommendation Unlearning","publication_year":2025,"publication_date":"2025-07-24","ids":{"openalex":"https://openalex.org/W4412627858","doi":"https://doi.org/10.1145/3749990"},"language":"en","primary_location":{"id":"doi:10.1145/3749990","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3749990","pdf_url":null,"source":{"id":"https://openalex.org/S2492086750","display_name":"ACM Transactions on Intelligent Systems and Technology","issn_l":"2157-6904","issn":["2157-6904","2157-6912"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319798","host_organization_name":"Association for Computing Machinery","host_organization_lineage":["https://openalex.org/P4310319798"],"host_organization_lineage_names":["Association for Computing Machinery"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ACM Transactions on Intelligent Systems and Technology","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":null,"display_name":"Yang Li","orcid":"https://orcid.org/0009-0006-7830-6968"},"institutions":[{"id":"https://openalex.org/I180726961","display_name":"Shenzhen University","ror":"https://ror.org/01vy4gh70","country_code":"CN","type":"education","lineage":["https://openalex.org/I180726961"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Yang Li","raw_affiliation_strings":["College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China"],"affiliations":[{"raw_affiliation_string":"College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China","institution_ids":["https://openalex.org/I180726961"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021191789","display_name":"Enyue Yang","orcid":"https://orcid.org/0009-0004-0522-2654"},"institutions":[{"id":"https://openalex.org/I180726961","display_name":"Shenzhen University","ror":"https://ror.org/01vy4gh70","country_code":"CN","type":"education","lineage":["https://openalex.org/I180726961"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Enyue Yang","raw_affiliation_strings":["College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China"],"affiliations":[{"raw_affiliation_string":"College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China","institution_ids":["https://openalex.org/I180726961"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5073490832","display_name":"Weike Pan","orcid":"https://orcid.org/0000-0001-6326-9531"},"institutions":[{"id":"https://openalex.org/I180726961","display_name":"Shenzhen University","ror":"https://ror.org/01vy4gh70","country_code":"CN","type":"education","lineage":["https://openalex.org/I180726961"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Weike Pan","raw_affiliation_strings":["College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China"],"affiliations":[{"raw_affiliation_string":"College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China","institution_ids":["https://openalex.org/I180726961"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100636286","display_name":"Qiang Yang","orcid":"https://orcid.org/0000-0001-5059-8360"},"institutions":[{"id":"https://openalex.org/I14243506","display_name":"Hong Kong Polytechnic University","ror":"https://ror.org/0030zas98","country_code":"HK","type":"education","lineage":["https://openalex.org/I14243506"]},{"id":"https://openalex.org/I4210100255","display_name":"Beijing Academy of Artificial Intelligence","ror":"https://ror.org/016a74861","country_code":"CN","type":"other","lineage":["https://openalex.org/I4210100255"]}],"countries":["CN","HK"],"is_corresponding":false,"raw_author_name":"Qiang Yang","raw_affiliation_strings":["Academy for Artificial Intelligence, Hong Kong Polytechnic University, Hong Kong, China","Academy for Artificial Intelligence, Hong Kong Polytechnic University, China"],"affiliations":[{"raw_affiliation_string":"Academy for Artificial Intelligence, Hong Kong Polytechnic University, Hong Kong, China","institution_ids":["https://openalex.org/I14243506"]},{"raw_affiliation_string":"Academy for Artificial Intelligence, Hong Kong Polytechnic University, China","institution_ids":["https://openalex.org/I14243506","https://openalex.org/I4210100255"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100633979","display_name":"Zhong Ming","orcid":"https://orcid.org/0000-0002-6933-5760"},"institutions":[{"id":"https://openalex.org/I4210152380","display_name":"Shenzhen Technology University","ror":"https://ror.org/04qzpec27","country_code":"CN","type":"education","lineage":["https://openalex.org/I4210152380"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Zhong Ming","raw_affiliation_strings":["College of Big Data and Internet, Shenzhen Technology University, Shenzhen, China"],"affiliations":[{"raw_affiliation_string":"College of Big Data and Internet, Shenzhen Technology University, Shenzhen, China","institution_ids":["https://openalex.org/I4210152380"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":5,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I180726961"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.26285802,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"16","issue":"5","first_page":"1","last_page":"24"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"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/T10203","display_name":"Recommender Systems and Techniques","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"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":0.9905999898910522,"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/T11478","display_name":"Caching and Content Delivery","score":0.9721999764442444,"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":0.8995959758758545},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.3739881217479706},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.36425134539604187}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8995959758758545},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.3739881217479706},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.36425134539604187}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/3749990","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3749990","pdf_url":null,"source":{"id":"https://openalex.org/S2492086750","display_name":"ACM Transactions on Intelligent Systems and Technology","issn_l":"2157-6904","issn":["2157-6904","2157-6912"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319798","host_organization_name":"Association for Computing Machinery","host_organization_lineage":["https://openalex.org/P4310319798"],"host_organization_lineage_names":["Association for Computing Machinery"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ACM Transactions on Intelligent Systems and Technology","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G1020947672","display_name":null,"funder_award_id":"62461160311 and 62272315","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G2701552180","display_name":null,"funder_award_id":"JCYJ20240813141441054","funder_id":"https://openalex.org/F4320316880","funder_display_name":"Natural Science Foundation of Shenzhen City"}],"funders":[{"id":"https://openalex.org/F4320316880","display_name":"Natural Science Foundation of Shenzhen City","ror":null},{"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":38,"referenced_works":["https://openalex.org/W2605350416","https://openalex.org/W3154155772","https://openalex.org/W3174074918","https://openalex.org/W3174532363","https://openalex.org/W3188298126","https://openalex.org/W3197363474","https://openalex.org/W3213758632","https://openalex.org/W4213390626","https://openalex.org/W4224325687","https://openalex.org/W4226493408","https://openalex.org/W4280588960","https://openalex.org/W4281686206","https://openalex.org/W4285015060","https://openalex.org/W4290944580","https://openalex.org/W4296562799","https://openalex.org/W4321521256","https://openalex.org/W4366196580","https://openalex.org/W4367046768","https://openalex.org/W4385154262","https://openalex.org/W4385768033","https://openalex.org/W4386171714","https://openalex.org/W4386730046","https://openalex.org/W4388069167","https://openalex.org/W4390214621","https://openalex.org/W4392081690","https://openalex.org/W4393160197","https://openalex.org/W4394717688","https://openalex.org/W4395000505","https://openalex.org/W4396723262","https://openalex.org/W4396723436","https://openalex.org/W4396757545","https://openalex.org/W4396758623","https://openalex.org/W4400528573","https://openalex.org/W4400533252","https://openalex.org/W4404927184","https://openalex.org/W4405078138","https://openalex.org/W4408733544","https://openalex.org/W4409363310"],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W2390279801","https://openalex.org/W4391913857","https://openalex.org/W2358668433","https://openalex.org/W4396701345","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W4396696052"],"abstract_inverted_index":{"Cross-user":[0],"federated":[1,72,87],"recommendation":[2,277],"(CUFR)":[3],"is":[4,75,123],"a":[5,71,102,124,177,186,222,230],"promising":[6,110],"solution":[7],"for":[8,192],"providing":[9,25],"personalized":[10,29],"services":[11],"without":[12],"collecting":[13],"users\u2019":[14],"raw":[15],"data.":[16],"However,":[17],"most":[18],"previous":[19],"CUFR":[20,91,179],"works":[21],"mainly":[22],"focus":[23],"on":[24,215,258],"accurate":[26],"and":[27,53,158,238],"privacy-preserving":[28],"recommendations,":[30],"but":[31],"overlook":[32],"the":[33,44,64,67,94,133,138,146,152,155,160,163,194,204,207,211,233,236,242,246,250,275],"fact":[34],"that":[35,127,264],"users":[36],"can":[37,267],"opt":[38],"out":[39,131],"at":[40,241],"any":[41],"time":[42],"during":[43],"training":[45,58,112],"process.":[46],"In":[47,172],"response,":[48],"we":[49,175,184,220,254],"study":[50],"an":[51,59,113,271],"emerging":[52],"new":[54,147,212,239],"problem":[55],"of":[56,66,93,132,154,162,206,235,245],"efficiently":[57,269],"unlearned":[60,114,272],"model":[61,273],"to":[62,77,90,142,200,228,262],"forget":[63],"data":[65],"clients":[68,129,140,199],"who":[69],"leave":[70],"system.":[73],"It":[74],"challenging":[76],"simply":[78],"apply":[79],"or":[80,86],"slightly":[81],"modify":[82],"existing":[83],"machine":[84],"unlearning":[85,88,180,247],"methods":[89],"because":[92],"unique":[95],"collaboration":[96],"effect":[97],"in":[98,111,144,203],"recommender":[99],"systems.":[100],"Although":[101],"recent":[103],"gradient":[104,187,225],"calibration-based":[105],"method":[106],"(i.e.,":[107],"FRU)":[108],"shows":[109],"model,":[115],"there":[116,122],"are":[117],"still":[118],"some":[119,128],"limitations:":[120],"(i)":[121],"potential":[125],"possibility":[126],"run":[130],"storage":[134],"space,":[135],"(ii)":[136],"all":[137],"remaining":[139],"need":[141],"participate":[143,202],"computing":[145],"gradients,":[148,157],"(iii)":[149],"it":[150],"masks":[151],"uniqueness":[153],"local":[156],"(iv)":[159],"errors":[161],"calibrated":[164,208],"gradients":[165,196,209,213,240],"will":[166],"increase":[167],"gradually":[168],"with":[169,210,274],"more":[170,268],"iterations.":[171],"this":[173],"article,":[174],"propose":[176],"novel":[178,223],"(CUFRU)":[181],"method.":[182],"Specifically,":[183],"design":[185,221],"transfer":[188],"station":[189],"(GTS)":[190],"module":[191],"storing":[193],"historical":[195,237],"while":[197],"enabling":[198],"dynamically":[201],"computation":[205],"based":[214],"their":[216],"online":[217],"status.":[218],"Moreover,":[219],"iteration-aware":[224],"calibration":[226,251],"mechanism":[227],"strike":[229],"balance":[231],"between":[232],"weights":[234],"different":[243],"stages":[244],"process,":[248],"alleviating":[249],"errors.":[252],"Finally,":[253],"conduct":[255],"extensive":[256],"experiments":[257],"three":[259],"real-world":[260],"datasets":[261],"show":[263],"our":[265],"CUFRU":[266],"train":[270],"competitive":[276],"performance.":[278]},"counts_by_year":[],"updated_date":"2026-04-09T08:11:56.329763","created_date":"2025-10-10T00:00:00"}
