{"id":"https://openalex.org/W3113703213","doi":"https://doi.org/10.3390/computers10010007","title":"Smart Contract Data Feed Framework for Privacy-Preserving Oracle System on Blockchain","display_name":"Smart Contract Data Feed Framework for Privacy-Preserving Oracle System on Blockchain","publication_year":2020,"publication_date":"2020-12-28","ids":{"openalex":"https://openalex.org/W3113703213","doi":"https://doi.org/10.3390/computers10010007","mag":"3113703213"},"language":"en","primary_location":{"id":"doi:10.3390/computers10010007","is_oa":true,"landing_page_url":"https://doi.org/10.3390/computers10010007","pdf_url":"https://www.mdpi.com/2073-431X/10/1/7/pdf?version=1609140337","source":{"id":"https://openalex.org/S4210228075","display_name":"Computers","issn_l":"2073-431X","issn":["2073-431X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computers","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2073-431X/10/1/7/pdf?version=1609140337","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5011275070","display_name":"Junhoo Park","orcid":null},"institutions":[{"id":"https://openalex.org/I196345858","display_name":"Chungnam National University","ror":"https://ror.org/0227as991","country_code":"KR","type":"education","lineage":["https://openalex.org/I196345858"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Junhoo Park","raw_affiliation_strings":["Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea"],"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea","institution_ids":["https://openalex.org/I196345858"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5075768884","display_name":"Hyekjin Kim","orcid":null},"institutions":[{"id":"https://openalex.org/I196345858","display_name":"Chungnam National University","ror":"https://ror.org/0227as991","country_code":"KR","type":"education","lineage":["https://openalex.org/I196345858"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Hyekjin Kim","raw_affiliation_strings":["Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea"],"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea","institution_ids":["https://openalex.org/I196345858"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101843058","display_name":"Geunyoung Kim","orcid":"https://orcid.org/0000-0002-8052-7683"},"institutions":[{"id":"https://openalex.org/I196345858","display_name":"Chungnam National University","ror":"https://ror.org/0227as991","country_code":"KR","type":"education","lineage":["https://openalex.org/I196345858"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Geunyoung Kim","raw_affiliation_strings":["Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea"],"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea","institution_ids":["https://openalex.org/I196345858"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5058141460","display_name":"Jae\u2010Cheol Ryou","orcid":"https://orcid.org/0000-0002-2374-995X"},"institutions":[{"id":"https://openalex.org/I196345858","display_name":"Chungnam National University","ror":"https://ror.org/0227as991","country_code":"KR","type":"education","lineage":["https://openalex.org/I196345858"]}],"countries":["KR"],"is_corresponding":true,"raw_author_name":"Jaecheol Ryou","raw_affiliation_strings":["Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea"],"affiliations":[{"raw_affiliation_string":"Department of Computer Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea","institution_ids":["https://openalex.org/I196345858"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5058141460"],"corresponding_institution_ids":["https://openalex.org/I196345858"],"apc_list":{"value":1600,"currency":"CHF","value_usd":1732},"apc_paid":{"value":1600,"currency":"CHF","value_usd":1732},"fwci":5.2872,"has_fulltext":true,"cited_by_count":32,"citation_normalized_percentile":{"value":0.96052871,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":97,"max":99},"biblio":{"volume":"10","issue":"1","first_page":"7","last_page":"7"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10270","display_name":"Blockchain Technology Applications and Security","score":1.0,"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/T10270","display_name":"Blockchain Technology Applications and Security","score":1.0,"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":0.9973999857902527,"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/T11614","display_name":"Cloud Data Security Solutions","score":0.9970999956130981,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/blockchain","display_name":"Blockchain","score":0.8968449831008911},{"id":"https://openalex.org/keywords/smart-contract","display_name":"Smart contract","score":0.8588109016418457},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7656887769699097},{"id":"https://openalex.org/keywords/oracle","display_name":"Oracle","score":0.7488498091697693},{"id":"https://openalex.org/keywords/cryptocurrency","display_name":"Cryptocurrency","score":0.6746031641960144},{"id":"https://openalex.org/keywords/random-oracle","display_name":"Random oracle","score":0.6002018451690674},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.5323391556739807},{"id":"https://openalex.org/keywords/database","display_name":"Database","score":0.5061644911766052},{"id":"https://openalex.org/keywords/middleware","display_name":"Middleware (distributed applications)","score":0.49293947219848633},{"id":"https://openalex.org/keywords/data-integrity","display_name":"Data integrity","score":0.4693155288696289},{"id":"https://openalex.org/keywords/rewriting","display_name":"Rewriting","score":0.4306044280529022},{"id":"https://openalex.org/keywords/software-engineering","display_name":"Software engineering","score":0.2052663266658783},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.18010807037353516},{"id":"https://openalex.org/keywords/public-key-cryptography","display_name":"Public-key cryptography","score":0.12769436836242676},{"id":"https://openalex.org/keywords/encryption","display_name":"Encryption","score":0.11775234341621399}],"concepts":[{"id":"https://openalex.org/C2779687700","wikidata":"https://www.wikidata.org/wiki/Q20514253","display_name":"Blockchain","level":2,"score":0.8968449831008911},{"id":"https://openalex.org/C2779950589","wikidata":"https://www.wikidata.org/wiki/Q7544035","display_name":"Smart contract","level":3,"score":0.8588109016418457},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7656887769699097},{"id":"https://openalex.org/C55166926","wikidata":"https://www.wikidata.org/wiki/Q2892946","display_name":"Oracle","level":2,"score":0.7488498091697693},{"id":"https://openalex.org/C180706569","wikidata":"https://www.wikidata.org/wiki/Q13479982","display_name":"Cryptocurrency","level":2,"score":0.6746031641960144},{"id":"https://openalex.org/C94284585","wikidata":"https://www.wikidata.org/wiki/Q228184","display_name":"Random oracle","level":4,"score":0.6002018451690674},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.5323391556739807},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.5061644911766052},{"id":"https://openalex.org/C169468491","wikidata":"https://www.wikidata.org/wiki/Q146923","display_name":"Middleware (distributed applications)","level":2,"score":0.49293947219848633},{"id":"https://openalex.org/C33762810","wikidata":"https://www.wikidata.org/wiki/Q461671","display_name":"Data integrity","level":2,"score":0.4693155288696289},{"id":"https://openalex.org/C154690210","wikidata":"https://www.wikidata.org/wiki/Q1668499","display_name":"Rewriting","level":2,"score":0.4306044280529022},{"id":"https://openalex.org/C115903868","wikidata":"https://www.wikidata.org/wiki/Q80993","display_name":"Software engineering","level":1,"score":0.2052663266658783},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.18010807037353516},{"id":"https://openalex.org/C203062551","wikidata":"https://www.wikidata.org/wiki/Q201339","display_name":"Public-key cryptography","level":3,"score":0.12769436836242676},{"id":"https://openalex.org/C148730421","wikidata":"https://www.wikidata.org/wiki/Q141090","display_name":"Encryption","level":2,"score":0.11775234341621399}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.3390/computers10010007","is_oa":true,"landing_page_url":"https://doi.org/10.3390/computers10010007","pdf_url":"https://www.mdpi.com/2073-431X/10/1/7/pdf?version=1609140337","source":{"id":"https://openalex.org/S4210228075","display_name":"Computers","issn_l":"2073-431X","issn":["2073-431X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computers","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:533396fba40c4ac09100e564fc39d234","is_oa":true,"landing_page_url":"https://doaj.org/article/533396fba40c4ac09100e564fc39d234","pdf_url":null,"source":{"id":"https://openalex.org/S112646816","display_name":"SHILAP Revista de lepidopterolog\u00eda","issn_l":"0300-5267","issn":["0300-5267","2340-4078"],"is_oa":true,"is_in_doaj":true,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Computers, Vol 10, Iss 1, p 7 (2020)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.3390/computers10010007","is_oa":true,"landing_page_url":"https://doi.org/10.3390/computers10010007","pdf_url":"https://www.mdpi.com/2073-431X/10/1/7/pdf?version=1609140337","source":{"id":"https://openalex.org/S4210228075","display_name":"Computers","issn_l":"2073-431X","issn":["2073-431X"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computers","raw_type":"journal-article"},"sustainable_development_goals":[{"score":0.6000000238418579,"id":"https://metadata.un.org/sdg/9","display_name":"Industry, innovation and infrastructure"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320328359","display_name":"Ministry of Science and ICT, South Korea","ror":"https://ror.org/01wpjm123"},{"id":"https://openalex.org/F4320335489","display_name":"Institute for Information and Communications Technology Promotion","ror":"https://ror.org/01g0hqq23"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W3113703213.pdf","grobid_xml":"https://content.openalex.org/works/W3113703213.grobid-xml"},"referenced_works_count":20,"referenced_works":["https://openalex.org/W4180724","https://openalex.org/W2018746447","https://openalex.org/W2043007983","https://openalex.org/W2138670865","https://openalex.org/W2266218113","https://openalex.org/W2517744317","https://openalex.org/W2533941064","https://openalex.org/W2574087453","https://openalex.org/W2751559473","https://openalex.org/W2785677877","https://openalex.org/W2794332692","https://openalex.org/W2797481382","https://openalex.org/W2886562467","https://openalex.org/W2948043589","https://openalex.org/W2952690057","https://openalex.org/W2972152617","https://openalex.org/W2989515460","https://openalex.org/W3108644808","https://openalex.org/W4300127641","https://openalex.org/W6712237015"],"related_works":["https://openalex.org/W4206573979","https://openalex.org/W4376606592","https://openalex.org/W3134943724","https://openalex.org/W4226450231","https://openalex.org/W3128874327","https://openalex.org/W4310359753","https://openalex.org/W4241377059","https://openalex.org/W4306873660","https://openalex.org/W4281724837","https://openalex.org/W3113703213"],"abstract_inverted_index":{"As":[0],"blockchain-based":[1],"applications":[2],"and":[3,59,95,118,164,168],"research":[4],"such":[5],"as":[6],"cryptocurrency":[7],"increase,":[8],"an":[9,37],"oracle":[10,27,33],"problem":[11],"to":[12,24,170],"bring":[13],"external":[14,57,73,90],"data":[15,74,93,102,130,163],"in":[16,63,104],"the":[17,22,26,49,65,101,105,112,152,166,174,179],"blockchain":[18],"is":[19],"emerging.":[20],"Among":[21],"methods":[23,46],"solve":[25,79],"problem,":[28,81],"a":[29,68,84,109,120,157],"method":[30],"of":[31,51,67,87,89,178],"configuring":[32,64],"based":[34,71],"on":[35,72],"TLS,":[36],"existing":[38],"internet":[39],"infrastructure,":[40],"has":[41],"been":[42],"proposed.":[43],"However,":[44],"these":[45,128],"currently":[47],"have":[48],"disadvantage":[50],"not":[52,132],"supporting":[53],"privacy":[54,136],"protection":[55],"for":[56,76,161],"data,":[58],"there":[60],"are":[61],"limitations":[62],"process":[66],"smart":[69,121,148,175],"contract":[70,122,149,176],"verification":[75,96],"automation.":[77],"To":[78],"this":[80],"we":[82,155],"propose":[83],"framework":[85,99],"consisting":[86],"middleware":[88],"source":[91],"server,":[92],"prover,":[94],"contract.":[97],"The":[98],"converts":[100],"signed":[103],"web":[106],"server":[107,162],"into":[108],"proof":[110,158],"that":[111,123],"owner":[113],"can":[114,124,142],"prove":[115],"with":[116,172],"zk-SNARKs":[117],"provides":[119],"verify":[125,171],"this.":[126],"Through":[127],"procedures,":[129],"owners":[131],"only":[133],"protect":[134],"their":[135],"by":[137],"proving":[138],"themselves,":[139],"but":[140],"they":[141],"also":[143],"automate":[144],"on-chain":[145],"processing":[146],"through":[147],"verification.":[150],"For":[151],"proposed":[153],"framework,":[154],"create":[156],"using":[159],"libsnark":[160],"show":[165],"performance":[167],"cost":[169],"Solidity":[173],"language":[177],"Ethereum":[180],"platform.":[181]},"counts_by_year":[{"year":2025,"cited_by_count":7},{"year":2024,"cited_by_count":6},{"year":2023,"cited_by_count":5},{"year":2022,"cited_by_count":9},{"year":2021,"cited_by_count":5}],"updated_date":"2026-04-21T08:09:41.155169","created_date":"2021-01-05T00:00:00"}