{"id":"https://openalex.org/W7203795118","doi":"https://doi.org/10.48550/arxiv.2608.17610","title":"Towards the Impossibility of Imperfectly Complete Key Agreement in the QROM","display_name":"Towards the Impossibility of Imperfectly Complete Key Agreement in the QROM","publication_year":2026,"publication_date":"2026-08-18","ids":{"openalex":"https://openalex.org/W7203795118","doi":"https://doi.org/10.48550/arxiv.2608.17610"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2608.17610","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.17610","pdf_url":"https://arxiv.org/pdf/2608.17610","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"volume":null,"type":"preprint","indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2608.17610","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5091263466","display_name":"Fuyuki Kitagawa","orcid":"https://orcid.org/0000-0002-9268-087X","observed_orcids":["https://orcid.org/0000-0002-9268-087X"]},"institutions":[{"id":"https://openalex.org/I2251713219","display_name":"NTT (Japan)","ror":"https://ror.org/00berct97","country_code":"JP","type":"company","lineage":["https://openalex.org/I2251713219"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kitagawa, Fuyuki","raw_affiliation_strings":["NTT , Tokyo , Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT , Tokyo , Japan","institution_ids":["https://openalex.org/I2251713219"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021254385","display_name":"Ryo Nishimaki","orcid":"https://orcid.org/0000-0002-5144-4619","observed_orcids":["https://orcid.org/0000-0002-5144-4619"]},"institutions":[{"id":"https://openalex.org/I2251713219","display_name":"NTT (Japan)","ror":"https://ror.org/00berct97","country_code":"JP","type":"company","lineage":["https://openalex.org/I2251713219"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Nishimaki, Ryo","raw_affiliation_strings":["NTT , Tokyo , Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT , Tokyo , Japan","institution_ids":["https://openalex.org/I2251713219"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044573237","display_name":"Agnes Villanyi","orcid":"https://orcid.org/0009-0005-3121-2537","observed_orcids":["https://orcid.org/0009-0005-3121-2537"]},"institutions":[{"id":"https://openalex.org/I63966007","display_name":"Massachusetts Institute of Technology","ror":"https://ror.org/042nb2s44","country_code":"US","type":"education","lineage":["https://openalex.org/I63966007"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Villanyi, Agi","raw_affiliation_strings":["Massachusetts Institute of Technology , Cambridge , MA , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Massachusetts Institute of Technology , Cambridge , MA , USA","institution_ids":["https://openalex.org/I63966007"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5101434973","display_name":"Takashi Yamakawa","orcid":"https://orcid.org/0000-0003-1712-3026","observed_orcids":["https://orcid.org/0000-0003-1712-3026"]},"institutions":[{"id":"https://openalex.org/I2251713219","display_name":"NTT (Japan)","ror":"https://ror.org/00berct97","country_code":"JP","type":"company","lineage":["https://openalex.org/I2251713219"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Yamakawa, Takashi","raw_affiliation_strings":["NTT , Tokyo , Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT , Tokyo , Japan","institution_ids":["https://openalex.org/I2251713219"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10020","display_name":"Quantum Information and Cryptography","score":0.9204000234603882,"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/T10020","display_name":"Quantum Information and Cryptography","score":0.9204000234603882,"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":0.07360000163316727,"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/T10682","display_name":"Quantum Computing Algorithms and Architecture","score":0.0032999999821186066,"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/quantum-random-oracle-model","display_name":"quantum random oracle model","score":0.8199999928474426},{"id":"https://openalex.org/keywords/quantum-key-agreement","display_name":"quantum key agreement","score":0.8730000257492065},{"id":"https://openalex.org/keywords/impossibility-results","display_name":"impossibility results","score":0.6460000276565552},{"id":"https://openalex.org/keywords/oracle-access","display_name":"oracle access","score":0.38499999046325684},{"id":"https://openalex.org/keywords/classical-communication","display_name":"classical communication","score":0.33399999141693115}],"concepts":[{"id":"https://openalex.org/C2776261394","wikidata":"https://www.wikidata.org/wiki/Q315562","display_name":"Impossibility","level":2,"score":0.6521999835968018},{"id":"https://openalex.org/C55166926","wikidata":"https://www.wikidata.org/wiki/Q2892946","display_name":"Oracle","level":2,"score":0.564300000667572},{"id":"https://openalex.org/C127964579","wikidata":"https://www.wikidata.org/wiki/Q649676","display_name":"Alice and Bob","level":3,"score":0.546500027179718},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.5242999792098999},{"id":"https://openalex.org/C84114770","wikidata":"https://www.wikidata.org/wiki/Q46344","display_name":"Quantum","level":2,"score":0.48980000615119934},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.478300005197525},{"id":"https://openalex.org/C148730421","wikidata":"https://www.wikidata.org/wiki/Q141090","display_name":"Encryption","level":2,"score":0.4618000090122223},{"id":"https://openalex.org/C144901912","wikidata":"https://www.wikidata.org/wiki/Q471906","display_name":"Quantum cryptography","level":4,"score":0.4268999993801117},{"id":"https://openalex.org/C178489894","wikidata":"https://www.wikidata.org/wiki/Q8789","display_name":"Cryptography","level":2,"score":0.4235999882221222},{"id":"https://openalex.org/C198104137","wikidata":"https://www.wikidata.org/wiki/Q974688","display_name":"Communication source","level":2,"score":0.4212999939918518},{"id":"https://openalex.org/C2779014939","wikidata":"https://www.wikidata.org/wiki/Q6510239","display_name":"Learning with errors","level":3,"score":0.4120999872684479},{"id":"https://openalex.org/C34388435","wikidata":"https://www.wikidata.org/wiki/Q2267362","display_name":"Bounded function","level":2,"score":0.4007999897003174},{"id":"https://openalex.org/C93974786","wikidata":"https://www.wikidata.org/wiki/Q1589480","display_name":"Ciphertext","level":3,"score":0.39579999446868896},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3797000050544739},{"id":"https://openalex.org/C2778222013","wikidata":"https://www.wikidata.org/wiki/Q1136926","display_name":"Alice (programming language)","level":2,"score":0.3752000033855438},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3456999957561493},{"id":"https://openalex.org/C94284585","wikidata":"https://www.wikidata.org/wiki/Q228184","display_name":"Random oracle","level":4,"score":0.3449000120162964},{"id":"https://openalex.org/C77553402","wikidata":"https://www.wikidata.org/wiki/Q13222579","display_name":"Upper and lower bounds","level":2,"score":0.32429999113082886},{"id":"https://openalex.org/C147323434","wikidata":"https://www.wikidata.org/wiki/Q7269086","display_name":"Quantum pseudo-telepathy","level":5,"score":0.32190001010894775},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.31360000371932983},{"id":"https://openalex.org/C137019171","wikidata":"https://www.wikidata.org/wiki/Q2623817","display_name":"Quantum algorithm","level":3,"score":0.31209999322891235},{"id":"https://openalex.org/C95466800","wikidata":"https://www.wikidata.org/wiki/Q1027298","display_name":"Quantum key distribution","level":3,"score":0.30880001187324524},{"id":"https://openalex.org/C78203541","wikidata":"https://www.wikidata.org/wiki/Q2566969","display_name":"BB84","level":5,"score":0.3043999969959259},{"id":"https://openalex.org/C58053490","wikidata":"https://www.wikidata.org/wiki/Q176555","display_name":"Quantum computer","level":3,"score":0.30059999227523804},{"id":"https://openalex.org/C182776695","wikidata":"https://www.wikidata.org/wiki/Q840661","display_name":"Ciphertext indistinguishability","level":5,"score":0.2948000133037567},{"id":"https://openalex.org/C15706264","wikidata":"https://www.wikidata.org/wiki/Q230883","display_name":"Quantum state","level":3,"score":0.27869999408721924},{"id":"https://openalex.org/C169699857","wikidata":"https://www.wikidata.org/wiki/Q2122243","display_name":"Quantum information","level":3,"score":0.2775000035762787},{"id":"https://openalex.org/C90119067","wikidata":"https://www.wikidata.org/wiki/Q43260","display_name":"Polynomial","level":2,"score":0.27559998631477356},{"id":"https://openalex.org/C121040770","wikidata":"https://www.wikidata.org/wiki/Q215675","display_name":"Quantum entanglement","level":3,"score":0.2517000138759613}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2608.17610","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.17610","pdf_url":"https://arxiv.org/pdf/2608.17610","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2608.17610","doi":"https://doi.org/10.48550/arxiv.2608.17610","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2608.17610","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2608.17610","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2608.17610","pdf_url":"https://arxiv.org/pdf/2608.17610","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7203795118.pdf","grobid_xml":"https://content.openalex.org/works/W7203795118.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W7172485787","https://openalex.org/W821699450","https://openalex.org/W4312926961","https://openalex.org/W4416529345","https://openalex.org/W2607766138","https://openalex.org/W4401667363","https://openalex.org/W1988306297","https://openalex.org/W2733954498","https://openalex.org/W2952991984","https://openalex.org/W2422308479"],"abstract_inverted_index":{"We":[0],"make":[1,93],"progress":[2],"towards":[3],"the":[4,14,24,50,61,100,111,128,160,178,216,220,246],"impossibility":[5],"of":[6,155,164,222],"quantum-computation,":[7],"classical-communication":[8],"(QCCC)":[9],"key":[10,112,168,195],"agreement":[11,130],"by":[12],"giving":[13],"first":[15],"unconditional":[16],"polynomial-query":[17],"attacks":[18],"that":[19],"tolerate":[20],"imperfect":[21],"completeness":[22],"in":[23,39,83,159,162,245],"following":[25],"settings.":[26],"First,":[27],"we":[28,74,136,228],"give":[29,75],"a":[30,76],"quantum":[31,58,66,71,94,143,201,251],"attack":[32,78,218],"on":[33,79],"protocols":[34,82],"with":[35,113,146,219,236],"arbitrarily":[36],"many":[37,255],"rounds":[38],"which":[40,84],"both":[41,98],"parties'":[42],"oracle":[43,67,88,172,188,202,256],"queries":[44,68,95,108],"and":[45,60,69,90,105,127,149,152,177,190,197,210,224,241],"communication":[46],"are":[47,192],"classical":[48,77,87,147,153,171,187],"before":[49],"final":[51,62],"round,":[52],"while":[53,174,194],"local":[54],"computation":[55],"may":[56,64,92,180,199],"be":[57,181],"throughout,":[59],"round":[63],"involve":[65],"one":[70],"message.":[72],"Second,":[73],"constant-round":[80,217,232],"QCCC":[81],"Alice":[85],"has":[86,170,186],"access":[89,189],"Bob":[91],"throughout.":[96],"In":[97],"settings,":[99],"attacker":[101],"is":[102,123,132],"computationally":[103,249],"unbounded":[104,250],"makes":[106],"$poly(\u03bb)$":[107,126],"to":[109],"recover":[110],"nonnegligible":[114],"probability":[115,131],"whenever":[116],"each":[117],"party's":[118],"total":[119],"honest":[120,212,238],"query":[121,213,239],"bound":[122],"at":[124],"most":[125],"valid":[129],"inverse-polynomial.":[133],"As":[134],"consequences,":[135],"rule":[137,230],"out":[138,231],"query-bounded":[139],"IND-CPA":[140],"security":[141],"for":[142],"public-key":[144],"encryption":[145,185],"public":[148],"secret":[150],"keys":[151],"messages":[154],"polynomially":[156,254],"bounded":[157],"length":[158],"QROM":[161,247],"either":[163],"two":[165],"settings:":[166],"(i)":[167],"generation":[169,196],"access,":[173],"encryption,":[175],"decryption,":[176],"ciphertext":[179],"quantum;":[182],"or":[183],"(ii)":[184],"ciphertexts":[191],"classical,":[193],"decryption":[198],"have":[200],"access.":[203],"Both":[204],"results":[205],"assume":[206],"negligible":[207,242],"correctness":[208,243],"error":[209,244],"polynomial":[211,237],"complexity.":[214],"Combining":[215],"constructions":[221],"Bartusek":[223],"Khurana":[225],"(CRYPTO":[226],"2025),":[227],"also":[229],"oblivious":[233],"state":[234],"preparation":[235],"complexity":[240],"against":[248],"receivers":[252],"making":[253],"queries.":[257]},"counts_by_year":[],"updated_date":"2026-10-28T10:33:24.094632","created_date":"2026-08-20T00:00:00"}