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シン・ブロックチェーン / Truth of Blockchain

シン・ブロックチェーン / Truth of Blockchain

早稲田大学大学院経営管理研究科「フィンテック ─ 金融革新とインターネット」2025 夏の第5-6回で使用したスライドです。

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Kenji Saito

June 21, 2025
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  1. Light and Shadow — Generated by Stable Diffusion 3.5 —

    2025 5-6 (WBS) — 2025 5-6 — 2025-06-23 – p.1/57
  2. ( ) 1 6 9 (1) • 2 6 9

    (2) • 3 6 16 Web3 (1) • 4 6 16 Web3 (2) • 5 6 23 (1) • 6 6 23 (2) • 7 6 30 (1) 8 6 30 (2) 9 7 7 (1) 10 7 7 (2) 11 7 14 (1) 12 7 14 (2) 13 7 21 (1) 14 7 21 (2) W-IOI ( ) — 2025 5-6 — 2025-06-23 – p.3/57
  3. ( 20 ) 1 ↑ 2 ↓ 2025 3 4

    (TCP/IP ) 5 6 7 8 ↑ 9 ↓ 2024 ( ) 10 World Wide Web 11 Web API 12 * 13 git GitHub 14 (6/23 ) / (2 ) OK / — 2025 5-6 — 2025-06-23 – p.4/57
  4. ( ) Web3 (1) — Web3 (2) — on API

    ( ) — 2025 5-6 — 2025-06-23 – p.5/57
  5. Web3 (1) — Web3 (2) — ← — 2025 5-6

    — 2025-06-23 – p.6/57
  6. 2. (1) (end; ) (2) 2025 6 19 ( )

    23:59 JST ( ) Waseda Moodle — 2025 5-6 — 2025-06-23 – p.8/57
  7. . . . . . . 17 15 (6/20( )

    ) ( ) ( ) ( ) (4 ) ( ) (3 ) (3 ) ( ) (2 ) (1 ) (1 ) (1 ) — 2025 5-6 — 2025-06-23 – p.9/57
  8. A ID DID DID DID ⇒ ( ) Claim( )

    DID VC (Verifiable Credentials) issuer issuer DID VC , “Decentralized Identifiers (DID) Verifiable Credentials (VC) ” — 2025 5-6 — 2025-06-23 – p.11/57
  9. I paypay) paypay paypay ( ) ⇒ ( ) AI

    — 2025 5-6 — 2025-06-23 – p.12/57
  10. Web3 (1) — ← Web3 NFT DAO — 2025 5-6

    — 2025-06-23 – p.13/57
  11. DAO ಺෦ࢿຊˢ͋Δ ɹɹɹɹˣͳ͍ தԝʹࣗಈ ɹɹɹɹɹWT ɹɹɹɹɹɹதԝʹਓؒ ׬શͳ "* σʔϞϯ˞ ϑΥʔϥϜ˞

    XFC αʔϏε ϩϘοτΛ࢖໾ %"0 %"QQ˞ ݹయత૊৫ ɹɹɹɹɹपลʹਓؒ ɹɹɹɹWT पลʹࣗಈ ˞%"QQεϚʔτίϯτϥΫτʹΑΔΞϓϦέʔγϣϯ %FDFOUSBMJ[FE"QQ ˞ϑΥʔϥϜਓʑ͕ಛఆͷ࿩୊ʹ͍ͭͯٞ࿦ͨ͠Γ৘ใΛަ׵ͨ͠Γ͢Δ৔ ˞σʔϞϯόοΫάϥ΢ϯυͰՔಇ͠ ΠϕϯτʹࣗಈతʹରԠ͢ΔϓϩάϥϜ . . . Buterin DAO (2014) — 2025 5-6 — 2025-06-23 – p.15/57
  12. DAO $ brownie bake dao README https://github.com/brownie-mix/dao-mix ( OpenZeppelin )

    ( ) ( DAO ) ( ) DAO . . . (2024 4 ) DAO ( ) — 2025 5-6 — 2025-06-23 – p.16/57
  13. DAO Bitcoin DAO → DAO Ethereum DAO → . .

    . DAO ( ) ( ) DAO → . . . ( ) ↑ ( ) ← — 2025 5-6 — 2025-06-23 – p.17/57
  14. — Web 3.0 ( ) ( ) ( . .

    . ) ( ) . . . DAO . . . — 2025 5-6 — 2025-06-23 – p.18/57
  15. N NFT ⇒ ( ) NFT NFT — 2025 5-6

    — 2025-06-23 – p.20/57
  16. Y NFT NFT NFT ETH ⇒ NFT Ethereum ETH —

    2025 5-6 — 2025-06-23 – p.21/57
  17. H DAO “ ” ⇒ ( ) DAO — 2025

    5-6 — 2025-06-23 – p.22/57
  18. (2) ↓ (1) (2) ( ) (3) ( ) bitcoin

    — 2025 5-6 — 2025-06-23 – p.25/57
  19. (by Satoshi Nakamoto) Satoshi ( ) (block; , ) ←

    (chain; ) ← — 2025 5-6 — 2025-06-23 – p.26/57
  20. Bitcoin . . . Bitcoin YouTuber ( ) ( )

    ( ) ( ) Bitcoin ( ) YouTube, Zoom, etc. ??? YouTube Zoom ( ) — 2025 5-6 — 2025-06-23 – p.27/57
  21. Bitcoin (1) Bitcoin = ( ) Bitcoin ⇒ P2P ⇒

    ( ) — 2025 5-6 — 2025-06-23 – p.28/57
  22. Bitcoin (2) (double spending) ( ) ⇒ ⇒ ( )

    → ( ) ( ) ( ) ⇒ → → ⇒ → — 2025 5-6 — 2025-06-23 – p.29/57
  23. Bitcoin ϏοτίΠϯωοτϫʔΫ ɾ ճͷʮ࠾۷ʯྔ͸໿  ೥ຖʹ൒ݮ ɾ߹ܭ໿   ສ

    #5$ ·Ͱ औҾͷొ࿥ ख਺ྉ ख਺ྉ औҾͷঝೝ ϚΠχϯά࣌ ϚΠχϯά ࠾۷ ͸ ֬཰తաఔ ฏۉ  ෼͓͖ʹ੒ޭ ૹۚࢦࣔ͸֤͕ࣗ΋ͭ ϓϥΠϕʔτΩʔͰ ແͨ͘͠Β࠶ൃߦෆՄ ϚΠφʔ ࠾۷ऀ ࢧ෷͍ɾ྆ସ ͳͲͷܦࡁ׆ಈ ར༻ऀ ϒϩοΫνΣʔϯ ݩா Πϯλʔωοτ্ͷԾ૝ωοτϫʔΫ ʜ ˞#5$ϏοτίΠϯͷ୯Ґ #5$ ରԠ ϒϩοΫ ϒϩοΫ ϒϩοΫ औҾ ૹۚ औҾͷه࿥ ΞυϨε Ѽઌ ϓϥΠϕʔτΩʔ ຊਓͷূ໌ — 2025 5-6 — 2025-06-23 – p.31/57
  24. / (1) Bitcoin 2,100 cm3 (cc) 1 1cm3 10 3.125cm3

    ⇒ ⇒ ( ) — 2025 5-6 — 2025-06-23 – p.33/57
  25. / (2) ( ) ( ) ( ) ( )

    ( ) → Bitcoin ( ) — 2025 5-6 — 2025-06-23 – p.34/57
  26. ∼ ϖʔδ൪߸O ϖʔδ൪߸O  ϖʔδ൪߸O  ϖʔδ൪߸O  ϖʔδ൪߸O 

    ϖʔδ൪߸O  ϖʔδ൪߸O  ϖʔδ൪߸O  ͬͪ͜ͷྺ࢙͕༗ޮ ( (= ) ) — 2025 5-6 — 2025-06-23 – p.37/57
  27. ϒϩοΫ൪߸O ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ϒϩοΫ൪߸O

     ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ͍ͪ͹Μه࿥ɾॻ͖׵͑ͷίετ͕ߴ͍ྺ࢙ ࠷΋վ͟Μ͠ʹ͍͘ྺ࢙ ͕༗ޮ ͻͱͭखલͷϒϩοΫͷ ʮμΠδΣετʯ σδλϧॺ໊͞Εͨ ʮτϥϯβΫγϣϯ औҾ ʯ ϒϩοΫΛ࡞ΔͨΊʹ͸ɺͦͷʮμΠδΣετʯ͕͋Δ਺ҎԼͱ͍͏৚݅Λຬͨͨ͠Γ 1SPPGPG8PSL Ծ૝௨՟ͷ࣋ͪ෼ʹԠͨ͡ݖརΛ࢖ͬͨ౤ථͰউͬͨΓ 1SPPGPG4UBLF ͢Δඞཁ͕͋Δ ίετ͕͔͔Δ ϒϩοΫΛ࡞Δਓ͸ͦͷதʹࣗ෼ʹѼͯͨ Ծ૝௨՟ͰͷใुΛॻ͖ࠐΉ͜ͱ͕Ͱ͖ɺ ͦͷϒϩοΫ͕༗ޮͳྺ࢙ͷதʹ͋Δ৔߹ʹ ݶΓใु΋༗ޮͱͳΔ τϥϯβΫγϣϯͷଘࡏΛ֬ೝ͢Δ ͨΊͷޮ཰తͳํ๏͕ఏڙ͞ΕΔ ਖ਼౰ੑ ଘࡏੑ །Ұੑ Proof of Work ( ) . . . → — 2025 5-6 — 2025-06-23 – p.38/57
  28. 0 and/or Bitcoin “The Times 03/Jan/2009 Chancellor on brink of

    second bailout for banks” 2009 1 3 2 https://www.blockchain.com/explorer 0 BTC Block “Hex to ASCII Text Converter” — 2025 5-6 — 2025-06-23 – p.39/57
  29. : ( ( ) ) ( ) — 2025 5-6

    — 2025-06-23 – p.40/57
  30. (Hyperledger ) ( ) ( ) ( ) ( )

    IoT / / ( , ) — 2025 5-6 — 2025-06-23 – p.41/57
  31. : Bitcoin . . . : Proof of Existence, Everledger,

    . . . ( ) ( ) / × = NFT (Non Fungible Token) — 2025 5-6 — 2025-06-23 – p.42/57
  32. ( ) จ ॻ  จ ॻ  จ ॻ

     จ ॻ  จ ॻ O μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ ح਺ͷ৔߹͸ ෳ੡͢Δ ɾจॻ ΛಘͨΫϥΠΞϯτ͸ɺಉ࣌ʹূ໌ཁૉͱͯ͠ɺϒϧʔͰࣔ͞ΕΔμΠδΣετͱ֤ʑ͕ࠨӈͷͲͪΒʹҐஔ͢Δ͔Λड͚औΔɻ ɾΫϥΠΞϯτ͸จॻ  ͷμΠδΣετ͔Β࢝Ίͯɺ࿈݁͢΂͖Ұ࿈ͷμΠδΣετΛ஌Δ͜ͱʹͳΔͷͰɺϚʔΫϧϧʔτʹࢸΔ·Ͱͷ ɹܭࢉΛ࠶ݱͰ͖ɺಘΒΕͨϚʔΫϧϧʔτ͕ϒϩοΫνΣʔϯʹه࿥͞Ε͍ͯΔ஋ͱҰக͢Δ͜ͱΛ֬ೝͰ͖Δɻ ɾͦͷܭࢉ͸ݪཧͷཧղͱඞཁͳ৘ใ͕͋Ε͹୭Ͱ΋࠶ݱͰ͖Δ  จॻ  ͷଘࡏͱͦͷ಺༰͸ূ໌͞ΕΔɻ ˞μΠδΣετ͸ݩͷσʔλ͕ ɹϏοτͰ΋ҟͳΔͱશ͘ҟͳΔ ɹ஋ͱͳΓɺ·ͨɺμΠδΣετ ɹ͔ΒݩͷσʔλΛਪଌ͢Δ͜ͱ͸ ɹͰ͖ͳ͍ɻ ˞਺ઍɾ਺ສͷจॻΛϚʔΫϧ໦ʹͯ͠΋ ɹͦͷ໦ͷߴ͞͸ߴʑʙ ఔ౓ ه࿥͢Δ ಡΈग़ͤΔ ূ໌Λ ඞཁͱ͢Δऀʹ ։ࣔ͞ΕΔ৘ใ ެ։͞ΕΔ৘ใ ϚʔΫϧϧʔτ Ϛ ồ Ϋ ϧ ໦  γ ε ς Ϝ ͕ อ ؅ ͠ ֤ Ϣ ồ β ʹ ෦ ෼ త ʹ ఻ ͑ Δ ʜʜ ʜʜ ʜʜ ʜʜ ʜʜ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ ϒϩοΫνΣʔϯ ʜ ʜ — 2025 5-6 — 2025-06-23 – p.43/57
  33. : ⇒ LINE → → ( ) ( ) ⇒

    ( ) → → → . . . — 2025 5-6 — 2025-06-23 – p.44/57
  34. ( ( )) ( ) / / — 2025 5-6

    — 2025-06-23 – p.45/57
  35. — 1. ( ) 2. ( ) 3. ( )

    — 2025 5-6 — 2025-06-23 – p.46/57
  36. (2009 1 ∼2025 6 ) 2 → 2 2 →

    → — 2025 5-6 — 2025-06-23 – p.48/57
  37. ( ) -12 -9 -7 -5 -3 -1 1 3

    5 7 9 11 Time Zone (UTC-relative) Capacity (GW) Bitcoin 0 20 40 60 80 100 120 140 ( — Bitcoin 19GW) Solar power by country ( ) 17GW (13 ) Bitcoin 13 Bitcoin 1 4 4.25GW 29 UTC — 2025 5-6 — 2025-06-23 – p.49/57
  38. 10 ATM 1 ATM 1 : http://www.slideshare.net/yamaz2/ss-58813038 ⇒ ( (

    ) ) — 2025 5-6 — 2025-06-23 – p.50/57
  39. The DAO ( ) Ethereum The DAO Split ( )

    360 ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) — 2025 5-6 — 2025-06-23 – p.52/57
  40. ( ) ( ) ( vs. ) ( ) (

    ) ( ) ⇒ ( : BBc-1, BBc-2) : : — 2025 5-6 — 2025-06-23 – p.53/57
  41. 3. (1) SF (2) 2023 6 26 ( ) 23:59

    JST ( ) Waseda Moodle — 2025 5-6 — 2025-06-23 – p.56/57