{"id":"https://openalex.org/W2951822995","doi":"https://doi.org/10.1109/tcc.2018.2865554","title":"Outsourcing Proofs of Retrievability","display_name":"Outsourcing Proofs of Retrievability","publication_year":2018,"publication_date":"2018-08-15","ids":{"openalex":"https://openalex.org/W2951822995","doi":"https://doi.org/10.1109/tcc.2018.2865554","mag":"2951822995"},"language":"en","primary_location":{"id":"doi:10.1109/tcc.2018.2865554","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcc.2018.2865554","pdf_url":null,"source":{"id":"https://openalex.org/S2492498579","display_name":"IEEE Transactions on Cloud Computing","issn_l":"2168-7161","issn":["2168-7161","2372-0018"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["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 Cloud Computing","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/A5032638181","display_name":"Frederik Armknecht","orcid":"https://orcid.org/0009-0003-9935-8095"},"institutions":[{"id":"https://openalex.org/I177802217","display_name":"University of Mannheim","ror":"https://ror.org/031bsb921","country_code":"DE","type":"education","lineage":["https://openalex.org/I177802217"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Frederik Armknecht","raw_affiliation_strings":["University of Mannheim, Mannheim, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Mannheim, Mannheim, Germany","institution_ids":["https://openalex.org/I177802217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044880971","display_name":"Jens-Matthias Bohli","orcid":null},"institutions":[{"id":"https://openalex.org/I112756935","display_name":"Technische Hochschule Mannheim","ror":"https://ror.org/04p61dj41","country_code":"DE","type":"education","lineage":["https://openalex.org/I112756935"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Jens-Matthias Bohli","raw_affiliation_strings":["Hochschule Mannheim, Mannheim, Germany","NEC Laboratories Europe, Heidelberg, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hochschule Mannheim, Mannheim, Germany","institution_ids":["https://openalex.org/I112756935"]},{"raw_affiliation_string":"NEC Laboratories Europe, Heidelberg, Germany","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059087800","display_name":"Ghassan Karame","orcid":"https://orcid.org/0000-0002-2828-4071"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Ghassan Karame","raw_affiliation_strings":["NEC Laboratories Europe, Heidelberg, Germany"],"raw_orcid":"https://orcid.org/0000-0002-2828-4071","affiliations":[{"raw_affiliation_string":"NEC Laboratories Europe, Heidelberg, Germany","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100440870","display_name":"Wenting Li","orcid":"https://orcid.org/0000-0002-9036-2392"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Wenting Li","raw_affiliation_strings":["NEC Laboratories Europe, Heidelberg, Germany"],"raw_orcid":"https://orcid.org/0000-0002-9036-2392","affiliations":[{"raw_affiliation_string":"NEC Laboratories Europe, Heidelberg, Germany","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":1.6452,"has_fulltext":false,"cited_by_count":21,"citation_normalized_percentile":{"value":0.89604415,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"9","issue":"1","first_page":"286","last_page":"301"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11614","display_name":"Cloud Data Security Solutions","score":0.9998999834060669,"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/T11614","display_name":"Cloud Data Security Solutions","score":0.9998999834060669,"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/T10237","display_name":"Cryptography and Data Security","score":0.9979000091552734,"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/T11424","display_name":"Security and Verification in Computing","score":0.9531999826431274,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8178893327713013},{"id":"https://openalex.org/keywords/retrievability","display_name":"Retrievability","score":0.8106507062911987},{"id":"https://openalex.org/keywords/cloud-computing","display_name":"Cloud computing","score":0.7037855386734009},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.6225463151931763},{"id":"https://openalex.org/keywords/mathematical-proof","display_name":"Mathematical proof","score":0.5702677369117737},{"id":"https://openalex.org/keywords/cryptography","display_name":"Cryptography","score":0.5628002882003784},{"id":"https://openalex.org/keywords/outsourcing","display_name":"Outsourcing","score":0.5062652826309204},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.4595862925052643},{"id":"https://openalex.org/keywords/public-key-cryptography","display_name":"Public-key cryptography","score":0.419073224067688},{"id":"https://openalex.org/keywords/encryption","display_name":"Encryption","score":0.2990334630012512},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.10566002130508423}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8178893327713013},{"id":"https://openalex.org/C191072391","wikidata":"https://www.wikidata.org/wiki/Q17043235","display_name":"Retrievability","level":3,"score":0.8106507062911987},{"id":"https://openalex.org/C79974875","wikidata":"https://www.wikidata.org/wiki/Q483639","display_name":"Cloud computing","level":2,"score":0.7037855386734009},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.6225463151931763},{"id":"https://openalex.org/C108710211","wikidata":"https://www.wikidata.org/wiki/Q11538","display_name":"Mathematical proof","level":2,"score":0.5702677369117737},{"id":"https://openalex.org/C178489894","wikidata":"https://www.wikidata.org/wiki/Q8789","display_name":"Cryptography","level":2,"score":0.5628002882003784},{"id":"https://openalex.org/C46934059","wikidata":"https://www.wikidata.org/wiki/Q61515","display_name":"Outsourcing","level":2,"score":0.5062652826309204},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.4595862925052643},{"id":"https://openalex.org/C203062551","wikidata":"https://www.wikidata.org/wiki/Q201339","display_name":"Public-key cryptography","level":3,"score":0.419073224067688},{"id":"https://openalex.org/C148730421","wikidata":"https://www.wikidata.org/wiki/Q141090","display_name":"Encryption","level":2,"score":0.2990334630012512},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.10566002130508423},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0},{"id":"https://openalex.org/C161156560","wikidata":"https://www.wikidata.org/wiki/Q1638872","display_name":"Document retrieval","level":2,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","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/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/tcc.2018.2865554","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcc.2018.2865554","pdf_url":null,"source":{"id":"https://openalex.org/S2492498579","display_name":"IEEE Transactions on Cloud Computing","issn_l":"2168-7161","issn":["2168-7161","2372-0018"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["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 Cloud Computing","raw_type":"journal-article"},{"id":"pmh:oai:ub-madoc.bib.uni-mannheim.de:60426","is_oa":false,"landing_page_url":"https://madoc.bib.uni-mannheim.de/60426/","pdf_url":null,"source":{"id":"https://openalex.org/S4377196315","display_name":"MADOC (University of Mannheim)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I177802217","host_organization_name":"University of Mannheim","host_organization_lineage":["https://openalex.org/I177802217"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Zeitschriftenartikel"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":28,"referenced_works":["https://openalex.org/W44164607","https://openalex.org/W75089012","https://openalex.org/W89553247","https://openalex.org/W157199674","https://openalex.org/W1480620864","https://openalex.org/W1994788755","https://openalex.org/W1995488889","https://openalex.org/W1995672990","https://openalex.org/W2027703952","https://openalex.org/W2040193872","https://openalex.org/W2058231031","https://openalex.org/W2058406610","https://openalex.org/W2067410255","https://openalex.org/W2079493184","https://openalex.org/W2095417570","https://openalex.org/W2102881299","https://openalex.org/W2111589710","https://openalex.org/W2144140331","https://openalex.org/W2152773915","https://openalex.org/W2407667300","https://openalex.org/W2573650873","https://openalex.org/W4211068006","https://openalex.org/W4248175462","https://openalex.org/W6603635020","https://openalex.org/W6606230620","https://openalex.org/W6675339306","https://openalex.org/W6713969110","https://openalex.org/W6732054689"],"related_works":["https://openalex.org/W107789802","https://openalex.org/W2358200898","https://openalex.org/W4231184955","https://openalex.org/W2325765407","https://openalex.org/W2788012436","https://openalex.org/W618293728","https://openalex.org/W2291845669","https://openalex.org/W200604156","https://openalex.org/W2374784346","https://openalex.org/W2601058089"],"abstract_inverted_index":{"Proofs":[0],"of":[1,86,118,121,195,212,233],"Retrievability":[2],"(POR)":[3],"are":[4],"cryptographic":[5],"proofs":[6,120],"that":[7,14,35,63,68,99,143,152,237,258,290],"enable":[8],"a":[9,15,167,171,179,184,262,271,282],"cloud":[10,41,89,139,284],"provider":[11],"to":[12,26,33,58,132,149,217],"prove":[13],"user":[16,32,294],"can":[17,42,69,127],"retrieve":[18],"his":[19],"file":[20],"in":[21,39,49,124,199,281],"its":[22],"entirety.":[23],"POR":[24,87,136,159,186,214,264],"need":[25,57],"be":[27,43,59],"frequently":[28],"executed":[29],"by":[30,76,88,157,265],"the":[31,40,71,77,83,116,138,144,193,196,206,238,242,247,301],"ensure":[34],"their":[36,279],"files":[37],"stored":[38],"fully":[44],"retrieved":[45],"at":[46],"any":[47],"point":[48],"time.":[50],"To":[51,162],"conduct":[52],"and":[53,67,134,170,190,219,226,267,277,296],"verify":[54,135],"POR,":[55],"users":[56,93,126],"equipped":[60],"with":[61,137],"devices":[62,98],"have":[64,100,108,153],"network":[65,109],"access,":[66],"tolerate":[70],"(non-negligible)":[72],"computational":[73,102,244],"overhead":[74,245,299],"incurred":[75],"verification":[78],"process.":[79],"This":[80],"clearly":[81],"hinders":[82],"large-scale":[84],"adoption":[85],"users,":[90],"since":[91],"many":[92],"increasingly":[94],"rely":[95],"on":[96,208,223,274,300],"portable":[97],"limited":[101],"capacity,":[103],"or":[104],"might":[105],"not":[106,154],"always":[107],"access.":[110],"In":[111],"this":[112,234],"paper,":[113],"we":[114,165,191,253],"introduce":[115],"notion":[117],"outsourced":[119],"retrievability":[122],"(OPOR),":[123],"which":[125],"task":[128],"an":[129,188,256],"external":[130],"auditor":[131],"perform":[133],"provider.":[140],"We":[141,176,204,269],"argue":[142],"OPOR":[145,189,198,240,257],"setting":[146],"is":[147,236,259],"subject":[148],"security":[150,160,172,194,202],"risks":[151],"been":[155],"covered":[156],"existing":[158],"models.":[161],"remedy":[163],"that,":[164],"propose":[166,178,254],"formal":[168],"framework":[169],"model":[173],"for":[174,182],"OPOR.":[175],"then":[177],"generic":[180],"procedure":[181],"transforming":[183],"public":[185,213,249],"into":[187],"show":[192,289],"resulting":[197],"our":[200,275,291],"proposed":[201],"model.":[203],"demonstrate":[205],"transformation":[207,235],"two":[209],"different":[210],"instantiations":[211],"schemes":[215],"due":[216],"Shacham":[218,266],"Waters":[220],"(Asiacrypt'08)-one":[221],"based":[222,273],"BLS":[224],"signatures":[225],"one":[227],"using":[228],"RSA":[229],"signatures.":[230],"A":[231],"shortcoming":[232],"generated":[239],"inherits":[241],"high":[243],"from":[246,261],"underlying":[248],"key":[250],"cryptography.":[251],"Consequently,":[252],"afterwards":[255],"build":[260],"private":[263],"Waters.":[268],"implement":[270],"prototype":[272],"solutions,":[276],"evaluate":[278],"performance":[280],"realistic":[283],"setting.":[285],"Our":[286],"evaluation":[287],"results":[288],"proposals":[292],"minimize":[293],"effort,":[295],"incur":[297],"negligible":[298],"auditor.":[302]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":6},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":2}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}