Blockchain Kyoto #10 Presentation

by Hide Ogawa

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3FEFTJHO #MPDLDIBJO,ZPUP ΦΨϫɹώσϢΩ

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)FMMP খ઒ɹӳ޾ɹ!NB[BSJNPOP #MPDLDIBJO,ZPUP ͸ΜͳΓ1ZUIPOͷձΦʔΨφΠβʔ ܦӦ߹ಉձࣾ௕໨ ϒϩοΫνΣʔϯ࢖ͬͯΈ͍ͨ ͳʹ͝ͱʹ΋શྗΛʂɹ

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5PEBZ ͜͜࠷ۙௐ΂ͨ͜ͱΛ·ͱΊͯ࿩͠·͢ 5SVTUMFTT 5SVTU ϚʔέοτσβΠϯ ඇதԝूݖ૊৫

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5SVTUMFTT ϒϩοΫνΣʔϯք۾ͰΑ͘࢖ΘΕΔ͜ͷݴ༿ ୭΋৴༻͠ͳ͍Ͱ΋ϒϩοΫνΣʔϯ͕ ࢖͑Δͱ͍͏Α͏ʹඈ༂ͨ͠ཧղ͕ߦΘΕ͍ͯΔ ͜ͷձͰ΋ͦͷΑ͏ͳٞ࿦͕ߦΘΕͨ ʢྫ͑͹ճઢͳͲΠϯϑϥʹର͢Δ৴༻͸ඞཁͰ͋Δʣ ߥా͞ΜʹΑΔͱ 4BUPTIJ1BQFSʹ͸ʮ৴པͰ͖Δୈࡾऀػؔ ͷ஥հͳ͠ʹૹ͕ۚͰ͖Δʯ͕ͦΕҎ্ͷ͜ͱ͸ॻ͍͍ͯͳ͍ɻ ʢݴ༿ͷ࢖͍ํͷҧ͍ʣ

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5SVTUMFTT ϊʔϕϧܦࡁֶ৆ड৆ͷέωεɾΞϩʔ ʮ΄΅͢΂ͯͷ঎औҾʹ͸ɺ͓ͷͣͱ৴པͷཁૉ͕ଘࡏ͠ɺ ҰఆظؒऔҾ͕ܧଓ͢Δ৔߹ʹ͸ඞͣ৴པ͕ଘࡏ͢Δʯɻʢதུʣ ʮ͜ͷੈքʹ͓͚Δܦࡁൃలͷ஗Εͷ΄ͱΜͲ͸ɺ૬ޓ৴པ͕ ͚͍ܽͯΔ͜ͱ͕ݪҼͩͱݴ͑ΔͩΖ͏ʯ ϨΠνΣϧɾϘοπϚϯ 53645ੈք࠷ઌ୺ͷاۀ͸͍͔ʹʪ৴པʫΛ߈ུ͔ͨ͠ ,JOEMFͷҐஔ/P ೔ܦ#1ࣾ,JOEMF൛

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5SVTUMFTT

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5SVTU ৴པͱ͸ԿͰ͠ΐ͏ʁʁʁ

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5SVTU ϨΠνΣϧɾϘοπϚϯ 53645 ࣾձֶऀ΋৺ཧֶऀ΋ܦࡁֶऀ΋ɺ৴པΛຐ๏ ͷΑ͏ͳܦࡁͷສೳༀͰ͋ΓɺࣾձΛͻͱͭʹ·ͱΊ ܦࡁΛճ͍ͯ͘͠५׈ࡎͩͱߟ͍͑ͯΔɻ ৴པ ɾط஌ͷ΋ͷͱະ஌ͷ΋ͷͷ伱ؒΛຒΊΔ͜ͱ ɾ৴པ͸ະ஌ͷ΋ͷʹࣗ৴Λ࣋ͭ͜ͱ ྫ͑͹ɺະ஌ͷ΋ͷΛͦΕΛ஌Βͳ͍ਓʹ ࢖ͬͯ΋Β͑ΔΑ͏ʹ͢Δ͜ͱ ɾͦͷ৴པͷ͔ͨͪͷมԽ͕ ςΫϊϩδʔʹΑΓى͜Δ

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5SVTU

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5SVTU ຊͰ͸ΞϦόόͷδϟοΫɾϚʔ͕͜Ε·Ͱڞ࢈ౘͷίω ࣾձͰ͋ͬͨதࠃͰωοτͰ͏·͘৴༻Λಘͯɺ ΞϦόό͕੒௕͍ͯͬͨ͜͠ͱ͕ड़΂ΒΕΔɻ ͦ͜Ͱ࢖ΘΕͨͷ͸Πϯλʔωοτͱ͍͏৽͍͠ ςΫϊϩδʔʹΑͬͯ৴པͷนΛ৐Γӽ͑ͤ͞Δ ͱ͍͏͜ͱͩͬͨɻ ৴པͷඈ༂ʢ໘ന͍ͱࢥ͏Μ͚ͩͲ໌֬ʹఆٛ͸͞Ε͍ͯͳ͍ʣ ϦεΫΛऔͬͯ৽͍͠ߦಈʹग़Δͱ͖ʹى͜Δ ωοτγϣοϐϯά͕࢖ΘΕͩͨ͠Γ ػؔʹର͢Δ৴པ͸ෆਖ਼ͳͲʹΑΓ ࣦΘΕɺঃʑʹݸਓʹ৴པ͕Ҡಈ࢝͠Ί͍ͯΔ ʢΧτϦοΫ༮ࣇٮ଴ɺ78೩අෆਖ਼ɺ೔࢈ͷෆਖ਼ʣ

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5SVTU "JSCOC

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5SVTU "JSCOC ஌Βͳ͍ਓ͕஌Βͳ͍ਓͷՈʹധ·ΔϏδωεϞσϧ ΞϝϦΧͱ͔ॐͰܸͨΕΔ͔΋͠ΕΜ͠ͳʔ $UP$ݸਓରݸਓ ͜Ε·Ͱେ͖͍ػ͕ؔߦ͍ͬͯͨϏδωεΛݸਓ͕ߦ͍࢝Ί͍ͯΔ ϓϥοτϑΥʔϜͰ৴པ͕ൃੜ͢ΔΑ͏ͳσβΠϯ͕ ໨ࢦ͞Ε͍ͯΔɻ

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5SVTU ɹ৴པͷ͔ͨͪͷมԽ ৴པͷͨΊͷσβΠϯ ͦΕΒͷσβΠϯͷͨΊʹ ॏཁͳ͜ͱͬͯʁʁ

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5SVTU

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5SVTU

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.BSLFU%FTJHO ɾɹࢢ৔ݟ͑͟ΔखʹΑΓधڅ͕ௐ੔͞ΕՁ͕ܾ֨ఆ ɹɹ͞ΕΔඇதԝूݖతͳଘࡏɻ ɹ ɾɹࢢ৔ɹରɹܭըܦࡁɹ ɾɹࢢ৔ͷࣦഊɹϦʔϚϯγϣοΫʢେۚ༥ڪ߄ʣ ɾɹ͏·͍͘͘ࢢ৔ͱ͏·͍͔͘ͳ͍ࢢ৔ ɹɹͦͷத਎Λ΋͏ͪΐͬͱݟͨ΄͏͕ྑ͍ͷͰ͸ʁʁ

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.BSLFU%FTJHO ɾ৽੍౓ܦࡁֶ ɹɹɾ৽ݹయ೿͔Βͷൃల ɹɹɾࢢ৔͸์͓͍ͬͯͯ΋͏·͍͘͘ͱ͜Ζͱͦ͏Ͱ ɹɹɹͳ͍ͱ͜Ζ͕͋Δɻ ɹɹɹɹͦͷࠩɹɹɹʹʹʹʹʼɹ੍౓ *OTUJUVUJPOTʣ ɹɹɾ੍౓ ɹɹɾϑΥʔϚϧϧʔϧʢཱݑతͳ΋ͷʣͱΠϯϑΥʔ ɹɹɹϚϧϧʔϧʢࠃಠಛͳ΋ͷʣ ɾ੍౓ͷ૊Έ߹Θͤ͸ෳࡶͰɺ੒ޭͨ͠ࠃͷγεςϜΛ ಋೖ͔ͨ͠ΒͱଞͷࠃͰ΋੒ޭ͢Δͱ͸ݶΒͳ͍ɻ

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.BSLFU%FTJHO ɾϚʔέοτσβΠϯ ɹɾࢢ৔ͷࣦഊ΍ػೳෆશʹؕͬͨܦࡁ੍౓ΛͲͷΑ͏ ɹɹʹ࠶ઃܭͨ͠Βྑ͍ͷ͔ʁͱ͍͏໰୊Λղܾ͢Δɻ ɹɾࣗ༝ࢢ৔͕ద੾ʹػೳ͢ΔͨΊʹ͸Կ͕ඞཁ͔ɺ ɹɹࢼߦࡨޡ͠ͳ͕ΒͦΕΛ୳͢ɻ͔ͳΓࡉ͔͍υϝΠ ɹɹϯ஌͕ࣝඞཁɻ ɹɾ΋ͱͱͳΔͷ͸Ϛονϯάɻࣗ෼ͷબ޷ͷΈͰͳ͘ ɹɹ૬खͷબ޷΋ຬͨ͞ΕΔΑ͏ͳղ͕ٻΊΒΕΔɻ

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.BSLFU%FTJHO ࠞཚͨ͠ࢢ৔Λ ͏·੍͘౓ઃܭͨ͠Θ͔ΓΑ͍ࣄྫ ֗தͰϘʔϧΛୣ͍߹͏ ໎࿭ۃ·Γͳ͍ήʔϜ

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.BSLFU%FTJHO ϧʔϧ͕࡞ΒΕϏοάϏδωεʹ

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.BSLFU%FTJHO ਅͷࢢ৔ டং͋Δ૪͍ͷ৔ॴ

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.BSLFU%FTJHO ɾࢀՃऀ੍͕౓ͷཪΛ߈Ίͳͯ͘ྑ͍Α͏ʹɻ ɾඞཁͳ͜ͱٻΊ͍ͯΔ΋ͷΛߟ͑Δ͚ͩͰྑ͍Α͏ʹɻ ɾଟগɺ੍౓ͷཪΛ͔͘Α͏ͳਓ͕͍ͯ΋ࢢ৔͕ػೳ͢ΔΑ͏ʹɻ ɾࢀՃऀ͕҆શ͔ͭ؆୯ʹࢢ৔ʹࢀՃͰ͖ΔΑ͏ʹɻ ɾࢢ৔ͷഁյɿࡒ࢈ͷอূʹؔ͢Δਓʑͷ৴པΛ่͢ɻ

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.BSLFU%FTJHO ͏·͍ࢢ৔ઃܭ औҾඅ༻͕গͳ͍ औҾඅ༻ɹ ɾܦࡁऔҾΛߦ͏ࡍͷίετ ɾԾ૝௨՟ަ׵ॴͰͷऔҾʢख਺ྉʣ ɾ͓ۚͰදͤΔίετͱදͤͳ͍ίετͷଘࡏ

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.BSLFU%FTJHO ɾɹࢢ৔͸͏·͍͘͘Α͏ઃܭ͕ඞཁʂ ɾɹͦͷ໨҆͸औҾίετͷ཈੍۩߹ ɾɹٯʹݴ͏ͱऔҾίετͷߴ͍ࢢ৔͸ࢀೖνϟϯεʂ

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%FDFOUSBMJ[BUJPO ɾɹதԝूݖPSඇதԝूݖܕɹ ޷Έ͸ਓʹΑΔɻ τϯσϞφΠఱ࠽ʹ཰͍ΒΕΔ૊৫ͷҰһͱͯ͠ಇ͔͘ɺ ࣗ෼ͰͲΜͲΜ΍͍͖͍ͬͯͨλΠϓ͔ʁ ྫ͑͹ɺࣗ෼ͰͲΜͲΜ΍͍͖͍ͬͯͨਓ͕ τοϓͷྗ͕ڧ͗͢Δ૊৫ʹ͍ΔͱϑΟοτ͠ͳ͍͠ɺ ٯ΋·ͨ͋Δɻ

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%JDFOUSBMJ[BUJPO ɾɹதԝूݖPSඇதԝूݖܕɹ ίετ͕ඇதԝूݖͷ΄͏͕͍҆ͱݴΘΕΔ͜ͱ΋ଟ͍ ͔͠͠ɺҰํతʹͦͷΑ͏ͳ͜ͱΛ͍͏ࣄ΋Ͱ͖ͳ͍ খ͞ͳ૊৫ͩͱதԝूݖతͳ૊৫ͷҙࢥܾఆͷίετ͸ͦΕ΄Ͳͳ͍ ҰํͰڊେ૊৫ͩͱதԝूݖͩͱҙࢥܾఆͷίετ͸ߴ͘ɺ ͦͷ૊৫ͷϥϯχϯάίετ΋ߴ͍ ҰํͰ૊৫ͷܗΛม͑Δࠔ೉͞΋͋Δ

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%FDFOUBSBMJ[BUJPO ɾɹதԝूݖPSඇதԝूݖܕ தԝूݖతͳ૊৫͸཰͍͍ͯΔఱ࠽͕͍ͳ͘ͳΔͱ่յ͢Δ ෼ࢄܕ૊৫͸ίϯηϯαε͕औΕͳ͍ͱ่յ͢Δ

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%FDFOUSBMJ[BUJPO ɾɹதԝूݖPSඇதԝूݖܕɹ ݱࡏͷ೔ຊͰ͸ԿͰ΋੓෎ʹཔΔ܏޲ʹ͋Δɻ ͦͯ͠ɺίετ͸૿͑ଓ͚ɾɾɾɾ ੫཰΋্͕͍ͬͯ͘ɻ ྫ͑͹

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%FDFOUSBMJ[BUJPO ߴ͍ͳΒ͍҆ͱ͜Ζʹಈ͘ͷ͕ ࢿຊओٛͳ͸ͣͳͷͰ͕͢ɾɾɾ ͜ͷΑ͏ͳࣄྫ͕࠷ۙͨ͘͞Μ͋Γɺ೔ຊ͸࣮֬ʹ୤ࢿຊओٛԽ ͍ͯ͠ΔΑ͏ʹݟ͑Δɻ

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%JDFOUSBMJ[BUJPO ࡾݖ෼ཱ ߦ੓ݖ ཱ๏ݖ ࢘๏ݖ ͜ͷΑ͏ͳݖྗͷ෼ࢄԽػೳ͕ ૊Έࠐ·Ε͍ͯΔ͕ɺ࣮࣭తʹ͸Ͳ͏͔ʁ

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%FDFOUSBMJ[BUJPO ϒϩοΫνΣʔϯͷࡾݖ෼ཱ ϚΠφʔ σΟϕϩούʔ Ϣʔβʔ ෼ཱʹͳ͍ͬͯΔ͔ʁʁ Ϣʔβʔऑ͗͢͡Όͳ͍ʁʁʁ ϚΠφʔڧ͗͢͡Όͳ͍ʁʁ

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%FDFOUSBMJ[BUJPO ϒϩοΫνΣʔϯͷઃܭΛม͑Δ ϚΠφʔ σΟϕϩούʔ Ϣʔβʔ ؂ࢹ૊৫ ؂ࢹ૊৫ͷ ΠϯηϯςΟϒઃܭʁʁ औҾॴɹ☓ ؂ࠪػؔ☓

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%FDFOUSBMJ[BUJPO ɾɹඇதԝूݖPS෼ࢄܕɹ ϒϩοΫνΣʔϯͰ͸ඇதԝूݖͱ͍͏ݴ༿͕࢖ΘΕ͍ͯΔ ߟ͑ͯΈΔͱ෼ࢄܕͱ͸·ͨҧ͏

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%JTUSJCVUFE 2VBSB8IBU`TUIFEJ⒎FSFODFCFUXFFOEJTUSJCVUFEBOE EFDFOUSBMJ[FEJO#JUDPJOMBOE IUUQTCJUMZ[9HT[ 7JUBMJL5IFNFBOJOHPG%FDFOUSBMJ[BUJPOIUUQTCJUMZU&6:Z5

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%JTUSJCVUFE ɾඇதԝूݖɹதԝ͕ෳ਺ ɾ෼ࢄɹதԝूݖͰ΋ࢄΒ͹ͬͯͨΒྑ͍ ɾͲͷΑ͏ͳઃܭ͕ٻΊΒΕ͍ͯΔ͔ʁ ɾϓϩτίϧ͕͋ͬͯͦͷӡ༻Λଟ͘ͷਓ͕ؔΘΔͱ͍͏ ͷ͸ඇதԝूݖPS෼ࢄʁʁ

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ݱ࣌఺·ͱΊ ɾઃܭ͸ॏཁ ์͓͍ͬͯͯ͏·͘͜ͱ͸ͦ͏ͦ͏ͳ͍ɻ ͦ͏ͳΔΑ͏ઃܭ͢Δ͜ͱɺͦΕΛमਖ਼͢Δ͜ͱॏཁɻ ɾڊਓͷݞͷ্ʹཱͭ ࠓ೔ݟͨΑ͏ʹ৭ʑͱܦࡁֶͰߟ͑ΒΕ͍ͯΔ ෦෼͕͋Δɻ ɾڵຯਂ͍෼໺Ͱ͋Δ ςοΫؔ࿈ٕज़ͷΈͰͳ͘๏ֶɺࣾձֶɺܦࡁֶ ͳͲଟ͘ͷ෼໺ͷߟ͕͑ඞཁͳ෼໺Ͱ͋Δɻ ͷͰɺΑΓଟ͘ͷ෼໺ͷਓʹࢀՃͯ͠΋ΒͬͯҙݟΛฉ͖͍ͨɻ