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。

Transcript

1. Light and Shadow — Generated by Stable Diffusion 3.5 — 2025 5-6 (WBS) — 2025 5-6 — 2025-06-23 – p.1/52
2. https://speakerdeck.com/ks91/collections/fintech-2025-summer — 2025 5-6 — 2025-06-23 – p.2/52
3. ( ) 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.3/52
4. ( 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.4/52
5. ( ) Web3 (1) — Web3 (2) — on API ( ) — 2025 5-6 — 2025-06-23 – p.5/52
6. Web3 (1) — Web3 (2) — ← — 2025 5-6 — 2025-06-23 – p.6/52
7. — 2025 5-6 — 2025-06-23 – p.7/52
8. 2. (1) (end; ) (2) 2025 6 19 ( ) 23:59 JST ( ) Waseda Moodle — 2025 5-6 — 2025-06-23 – p.8/52
9. . . . . . . 17 15 (6/20( ) ) ( ) ( ) ( ) (4 ) ( ) (3 ) (3 ) ( ) (2 ) (1 ) (1 ) (1 ) — 2025 5-6 — 2025-06-23 – p.9/52
10. A ⇒ (obligation) — 2025 5-6 — 2025-06-23 – p.10/52
11. 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.11/52
12. I paypay) paypay paypay ( ) ⇒ ( ) AI — 2025 5-6 — 2025-06-23 – p.12/52
13. Web3 (1) — ← Web3 NFT DAO — 2025 5-6 — 2025-06-23 – p.13/52
14. DAO (Decentralized Autonomous Organization) — 2025 5-6 — 2025-06-23 – p.14/52
15. DAO ಺෦ࢿຊˢ͋Δ ɹɹɹɹˣͳ͍ தԝʹࣗಈ ɹɹɹɹɹWT ɹɹɹɹɹɹதԝʹਓؒ ׬શͳ "* σʔϞϯ˞ ϑΥʔϥϜ˞ XFC αʔϏε ϩϘοτΛ࢖໾ %"0 %"QQ˞ ݹయత૊৫ ɹɹɹɹɹ
    
    पลʹਓؒ ɹɹɹɹ
    
    WT पลʹࣗಈ ˞
    %"QQ
    
    εϚʔτίϯτϥΫτʹΑΔΞϓϦέʔγϣϯ
    %FDFOUSBMJ[FE
    "QQ ˞
    ϑΥʔϥϜ
    
    ਓʑ͕ಛఆͷ࿩୊ʹ͍ͭͯٞ࿦ͨ͠Γ৘ใΛަ׵ͨ͠Γ͢Δ৔ ˞
    σʔϞϯ
    
    όοΫάϥ΢ϯυͰՔಇ͠
    ΠϕϯτʹࣗಈతʹରԠ͢ΔϓϩάϥϜ . . . Buterin DAO (2014) — 2025 5-6 — 2025-06-23 – p.15/52
16. 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.16/52
17. DAO Bitcoin DAO → DAO Ethereum DAO → . . . DAO ( ) ( ) DAO → . . . ( ) ↑ ( ) ← — 2025 5-6 — 2025-06-23 – p.17/52
18. — Web 3.0 ( ) ( ) ( . . . ) ( ) . . . DAO . . . — 2025 5-6 — 2025-06-23 – p.18/52
19. Web3 (2) — — 2025 5-6 — 2025-06-23 – p.19/52
20. N NFT ⇒ ( ) NFT NFT — 2025 5-6 — 2025-06-23 – p.20/52
21. Y NFT NFT NFT ETH ⇒ NFT Ethereum ETH — 2025 5-6 — 2025-06-23 – p.21/52
22. H DAO “ ” ⇒ ( ) DAO — 2025 5-6 — 2025-06-23 – p.22/52
23. — 2025 5-6 — 2025-06-23 – p.23/52
24. (1) ( ) 3 — 2025 5-6 — 2025-06-23 – p.24/52
25. (2) ↓ (1) (2) ( ) (3) ( ) bitcoin — 2025 5-6 — 2025-06-23 – p.25/52
26. (by Satoshi Nakamoto) Satoshi ( ) (block; , ) ← (chain; ) ← — 2025 5-6 — 2025-06-23 – p.26/52
27. Bitcoin . . . Bitcoin YouTuber ( ) ( ) ( ) ( ) Bitcoin ( ) YouTube, Zoom, etc. ??? YouTube Zoom ( ) — 2025 5-6 — 2025-06-23 – p.27/52
28. Bitcoin (1) Bitcoin = ( ) Bitcoin ⇒ P2P ⇒ ( ) — 2025 5-6 — 2025-06-23 – p.28/52
29. Bitcoin (2) (double spending) ( ) ⇒ ⇒ ( ) → ( ) ( ) ( ) ⇒ → → ⇒ → — 2025 5-6 — 2025-06-23 – p.29/52
30. — — 2025 5-6 — 2025-06-23 – p.30/52
31. 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.31/52
32. — 2025 5-6 — 2025-06-23 – p.32/52
33. / (1) Bitcoin 2,100 cm3 (cc) 1 1cm3 10 3.125cm3 ⇒ ⇒ ( ) — 2025 5-6 — 2025-06-23 – p.33/52
34. / (2) ( ) ( ) ( ) ( ) ( ) → Bitcoin ( ) — 2025 5-6 — 2025-06-23 – p.34/52
35. ∼ UTXO (= ) → — 2025 5-6 — 2025-06-23 – p.35/52
36. ∼ ท൪߸
    
    O ท൪߸
    
    O  ท൪߸
    
    O  લทͷμΠδΣετ λʔήοτҎԼͰͳ͍ͱ͍͚ͳ͍ ͸Έͩ͠ίʔφʔ μΠδΣετ͕λʔήοτҎԼʹͳΔΑ͏ʹೖΕΔద౰ͳ಺༰ ( ) → — 2025 5-6 — 2025-06-23 – p.36/52
37. ∼ ϖʔδ൪߸
    
    O ϖʔδ൪߸
    
    O  ϖʔδ൪߸
    
    O  ϖʔδ൪߸
    
    O  ϖʔδ൪߸
    
    O  ϖʔδ൪߸
    
    O  ϖʔδ൪߸
    
    O  ϖʔδ൪߸
    
    O  ͬͪ͜ͷྺ࢙͕༗ޮ ( (= ) ) — 2025 5-6 — 2025-06-23 – p.37/52
38. 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 1SPPG
    PG
    8PSL Ծ૝௨՟ͷ࣋ͪ෼ʹԠͨ͡ݖརΛ࢖ͬͨ౤ථͰউͬͨΓ 1SPPG
    PG
    4UBLF ͢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.38/52
39. 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.39/52
40. : ( ( ) ) ( ) — 2025 5-6 — 2025-06-23 – p.40/52
41. (Hyperledger ) ( ) ( ) ( ) ( ) IoT / / ( , ) — 2025 5-6 — 2025-06-23 – p.41/52
42. : Bitcoin . . . : Proof of Existence, Everledger, . . . ( ) ( ) / × = NFT (Non Fungible Token) — 2025 5-6 — 2025-06-23 – p.42/52
43. ( ) 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 ɹ
    
    ϏοτͰ΋ҟͳΔͱશ͘ҟͳΔ ɹ
    ஋ͱͳΓɺ·ͨɺμΠδΣετ ɹ
    ͔ΒݩͷσʔλΛਪଌ͢Δ͜ͱ͸ ɹ
    Ͱ͖ͳ͍ɻ ˞
    ਺ઍɾ਺ສͷจॻΛϚʔΫϧ໦ʹͯ͠΋ ɹ
    ͦͷ໦ͷߴ͞͸ߴʑ
    ʙ 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.43/52
44. : ⇒ LINE → → ( ) ( ) ⇒ ( ) → → → . . . — 2025 5-6 — 2025-06-23 – p.44/52
45. ( ( )) ( ) / / — 2025 5-6 — 2025-06-23 – p.45/52
46. — 1. ( ) 2. ( ) 3. ( ) — 2025 5-6 — 2025-06-23 – p.46/52
47. — 2025 5-6 — 2025-06-23 – p.47/52
48. ( ) ( ) ( vs. ) ( ) ( ) ( ) ⇒ ( : BBc-1, BBc-2) : : — 2025 5-6 — 2025-06-23 – p.48/52
49. SF — 2025 5-6 — 2025-06-23 – p.49/52
50. — 2025 5-6 — 2025-06-23 – p.50/52
51. 3. (1) SF (2) 2023 6 26 ( ) 23:59 JST ( ) Waseda Moodle — 2025 5-6 — 2025-06-23 – p.51/52
52. — 2025 5-6 — 2025-06-23 – p.52/52