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ブロックチェーン / Blockchain

ブロックチェーン / Blockchain

2021年6月21日、早稲田大学 大学院経営管理研究科の「フィンテック ─ 金融革新とインターネット (2021夏)」第6-7回にて使用したスライドです。

847a328633b1df6b11cc2f72430025e6?s=128

Kenji Saito
PRO

June 19, 2021
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  1. — 2021 6-7 (WBS) — 2021 6-7 — 2021-06-21 –

    p.1/67
  2. https://speakerdeck.com/ks91 — 2021 6-7 — 2021-06-21 – p.2/67

  3. ( ) 1 5 31 • 2 6 7 (1)

    • 3 6 7 (2) • 4 6 14 – (1) • 5 6 14 – (2) • 6 6 21 (1) • 7 6 21 (2) • 8 6 28 ( ) (1) 9 6 28 ( ) (2) 10 7 5 (1) 11 7 5 (2) 12 7 12 (1) 13 7 12 (2) 14 7 19 (1) 15 7 19 (2) — 2021 6-7 — 2021-06-21 – p.3/67
  4. 1. 2. 3. 4. 5. 6. 7. : 8. —

    2021 6-7 — 2021-06-21 – p.4/67
  5. 1. — 2021 6-7 — 2021-06-21 – p.5/67

  6. 3. (1) (end; ) (2) 2021 6 17 ( )

    23:59 JST Waseda Moodle (Discord ) — 2021 6-7 — 2021-06-21 – p.6/67
  7. . . . . . . 20 18 (6/18( )

    16:30 ) ( ) ( / / ) / / / / ( / ) / / / / / ( ) : https://www.nikkei.com/article/DGKKZO70015990W1A310C2KE8000/ ( ) : https://www.nikkei.com/article/DGKKZO70052650X10C21A3KE8000/ P2P — 2021 6-7 — 2021-06-21 – p.7/67
  8. M ( ) ⇒ — 2021 6-7 — 2021-06-21 –

    p.8/67
  9. O vs vs ⇒ DEX DEX : Decentralized EXchange :

    (distributed) (decentralized) (autonomous) — 2021 6-7 — 2021-06-21 – p.9/67
  10. M ( ) ⇒ (DAO) ( ) e-GOV — 2021

    6-7 — 2021-06-21 – p.10/67
  11. S ⇒ → — 2021 6-7 — 2021-06-21 – p.11/67

  12. N (= ) or (= ) ATM / ⇒ (

    ) : → ( ) : → — 2021 6-7 — 2021-06-21 – p.12/67
  13. H ⇒ ( ) (Bitcoin ) — 2021 6-7 —

    2021-06-21 – p.13/67
  14. 2. — 2021 6-7 — 2021-06-21 – p.14/67

  15. ( ) ( ) ( 16 ) SHA Secure Hash

    Algorithm ( ) 1 : — 2021 6-7 — 2021-06-21 – p.15/67
  16. SHA-1 https://shattered.it SHA-1 160 2017 2 Google (CWI) — 2021

    6-7 — 2021-06-21 – p.16/67
  17. — 2021 6-7 — 2021-06-21 – p.17/67

  18. (RSA) RSA (RSA : Rivest, Shamir, Adleman) ECDSA ( DSA

    : Digital Signature Algorithm) - — 2021 6-7 — 2021-06-21 – p.18/67
  19. : < , > : : < , , >

    : OK NG ⇒ — 2021 6-7 — 2021-06-21 – p.19/67
  20. ( ) ← CA — 2021 6-7 — 2021-06-21 –

    p.20/67
  21. 3. (by Satoshi Nakamoto) Satoshi ( ) (block; , )

    ← (chain; ) ← — 2021 6-7 — 2021-06-21 – p.21/67
  22. (1) ( ) 3 — 2021 6-7 — 2021-06-21 –

    p.22/67
  23. (2) ↓ (1) ( ) (2) (3) ( ) —

    2021 6-7 — 2021-06-21 – p.23/67
  24. (1) ( ) ⇒ P2P ⇒ ( ) — 2021

    6-7 — 2021-06-21 – p.24/67
  25. (2) (double spending) ( ) ⇒ ⇒ ( ) →

    ( ) ( ) ⇒ → → ⇒ → — 2021 6-7 — 2021-06-21 – p.25/67
  26. — — 2021 6-7 — 2021-06-21 – p.26/67

  27. (1) 2,100 cm3 (cc) 1 1cm3 ( ) 10 6.25cm3

    → 10 4 ( 21 ) 2009 1 50cm3 — 2021 6-7 — 2021-06-21 – p.27/67
  28. (2) . . . → — 2021 6-7 — 2021-06-21

    – p.28/67
  29. ∼ ท൪߸O ท൪߸O  ท൪߸O  લทͷμΠδΣετ λʔήοτҎԼͰͳ͍ͱ͍͚ͳ͍ ͸Έͩ͠ίʔφʔ μΠδΣετ͕λʔήοτҎԼʹͳΔΑ͏ʹೖΕΔద౰ͳ಺༰

    ( ) — 2021 6-7 — 2021-06-21 – p.29/67
  30. ∼ ϖʔδ൪߸O ϖʔδ൪߸O  ϖʔδ൪߸O  ϖʔδ൪߸O  ϖʔδ൪߸O 

    ϖʔδ൪߸O  ϖʔδ൪߸O  ϖʔδ൪߸O  ͬͪ͜ͷྺ࢙͕༗ޮ ( → ) ( ) — 2021 6-7 — 2021-06-21 – p.30/67
  31. 1 ( ) μΠδΣετ ϒϩοΫ O ϚΠχϯάใु ݻఆ஋  ख਺ྉ

    ೖྗͷ߹ܭͱग़ྗͷ߹ܭͷࠩ .FSLMF໦Λܭࢉͯ͠ ͦͷϧʔτ஋Λ֨ೲ ͍ͣΕऔҾه࿥͕औΓग़͞Εɺ ͦͷ࣌఺ͷਖ਼࢙ʹೖ͍ͬͯͳ͍΋ͷͳΒ ৽ͨͳϒϩοΫͷதʹ֨ೲ͞ΕΔ ᶃਖ਼౰ੑͷอূ ϏοτίΠϯͰ͸ 6590 ߏ଄ ᶄଘࡏੑͷূ໌ ϏοτίΠϯͰ͸࡞ۀূ໌෇͖ϋογϡνΣʔϯ ᶅ།Ұੑͷ߹ҙ ϏοτίΠϯͰ͸ φΧϞτɾίϯηϯαε ϒϩοΫ O  ϒϩοΫ O  ϒϩοΫ O  ϒϩοΫ O  ϒϩοΫ O  ϒϩοΫ O  μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ μΠδΣετ #5$ ੜ੒ औҾ औҾ औҾ औҾ ʜʜ ΑΓ௕͍ ࡞ۀূ໌ ͷίετ͕ΑΓ෷Θ Ε͍ͯΔ νΣʔϯ ͕༗ޮͱͳΔ μΠδΣετ㱡λʔήοτ 1SPPG0G8PSL ࡞ۀূ໌ աڈͷऔҾग़ྗ΁ͷࢀর σδλϧॺ໊ ެ։ݤ Ѽઌͱྔ ίΠϯ λʔήοτ ϊϯε ೖྗ ೖྗ ग़ྗ ग़ྗ 1. 10 ( ) 2. 3. 1 — 2021 6-7 — 2021-06-21 – p.31/67
  32. /LT(Ledger Technology) ਖ਼౰ੑͷอূ ྫ6590ߏ଄ͱσδλϧॺ໊ ଘࡏੑͷূ໌ ྫ࡞ۀূ໌෇͖ϋογϡνΣʔϯ །Ұੑͷ߹ҙ ྫφΧϞτɾίϯηϯαε ϧʔϧͷهड़ ྫ#5$ͷҠస

    ɾ τϥϯβΫγϣϯͷ಺༰͕վ͟ΜͰ͖ͣɺ ɾ ͦͷΞηοτʹؔ͢ΔաڈͷτϥϯβΫγϣϯྻʹরΒͯ͠ໃ६͕ͳ͘ɺ ɾ ͔ͭɺਖ਼౰ͳϢʔβʹΑΓ౤ೖ͞Ε͍ͯΔ͜ͱΛอূ͢Δ ɾաڈʹ͋ͬͨτϥϯβΫγϣϯͷূڌΛຣফͰ͖ͣɺ ɾ ͔ͭɺաڈʹͳ͔ͬͨτϥϯβΫγϣϯͷূڌΛ፻଄Ͱ͖ͳ͍ ɾໃ६͢Δ;ͨͭͷτϥϯβΫγϣϯ͕౤ೖ͞Εͨ৔߹ɺ ɹ ͍ͣΕ ؔ༩͢Δશһ͕ಉ͡ยํΛબΜͰྺ࢙ͷதʹҐஔ͚ͮΔ ɾΞϓϦέʔγϣϯϩδοΫ Կ͕ਖ਼͍͠τϥϯβΫγϣϯ͔ΛܾΊΔ End-to-End ( ) ( ) — 2021 6-7 — 2021-06-21 – p.32/67
  33. 4. — 2021 6-7 — 2021-06-21 – p.33/67

  34. (Hyperledger ) ( ) ( ) ( ) ( )

    IoT / / ( ) — 2021 6-7 — 2021-06-21 – p.34/67
  35. : . . . : Proof of Existence, Everledger, .

    . . ( ) ( ) ( ) — 2021 6-7 — 2021-06-21 – p.35/67
  36. ( KVS DHT) — 2021 6-7 — 2021-06-21 – p.36/67

  37. 5. — 2021 6-7 — 2021-06-21 – p.37/67

  38. (2009 1 ∼2021 6 ) 2 → 2 2 →

    → — 2021 6-7 — 2021-06-21 – p.38/67
  39. vs. — 2021 6-7 — 2021-06-21 – p.39/67

  40. The DAO ( ) The DAO Split ( ) 360

    ETH (50∼60 ) (2016/6/17) ( → ) ( → ; ) ( ) (2016/7/20 ) — 2021 6-7 — 2021-06-21 – p.40/67
  41. — 2021 6-7 — 2021-06-21 – p.41/67

  42. : ⇒ ⇒ — 2021 6-7 — 2021-06-21 – p.42/67

  43. Ether Ether Ether ( ) Ether Ether ( ) .

    . . . . . BTC ⇒ ( ) — 2021 6-7 — 2021-06-21 – p.43/67
  44. 3 1. ( : UTXO + ) ⇒ ( )

    2. ( : ) ⇒ 3. ( : ) TX ⇒ 2 3 — 2021 6-7 — 2021-06-21 – p.44/67
  45. / Bitcoin, Ethereum LT BBc-1 ( ) ( ) (

    ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ެڞۭؒ ɾτϥϯβΫγϣϯͷূڌΛແؔ܎ͳྺ࢙͕อ༗ ɾͲΕ͔ͷ୆ாΛແໃ६ʹॻ͖׵͑ͯ΋ূڌ͕࢒Δ τϥϯβΫγϣϯ ୆ா υϝΠϯ ϩʔΧϧۭؒ υϝΠϯ ϩʔΧϧۭؒ υϝΠϯ ϩʔΧϧۭؒ Ethereum ( ) — 2021 6-7 — 2021-06-21 – p.45/67
  46. — 2021 6-7 — 2021-06-21 – p.46/67

  47. Ethereum ( ) ( ) ⇒ (Casper) ( ) ⇒

    ZoE (Zcash on Ethereum) ( vs. ) ( ) ⇒ Plasma ( ) ⇒ ( ) (Benevolent Dictator For Life (BDFL)) ( ) ⇒ — 2021 6-7 — 2021-06-21 – p.47/67
  48. BBc-1 ( ) ( ) ⇒ ( ) ⇒ (

    vs. ) ( ) ⇒ DHT ( ) ⇒ ( ) ( ) ⇒ — 2021 6-7 — 2021-06-21 – p.48/67
  49. 6. — 2021 6-7 — 2021-06-21 – p.49/67

  50. ( ) (by ) (since 1984) ( ) ( )

    ( ) . . . ( ) ⇒ . . . — 2021 6-7 — 2021-06-21 – p.50/67
  51. ( ) ( ) ( ) ( ) ( )

    (by ) — 2021 6-7 — 2021-06-21 – p.51/67
  52. Q. ( ) ( = / = ) ⇒ —

    2021 6-7 — 2021-06-21 – p.52/67
  53. ( ) ( ) ( ) — 2021 6-7 —

    2021-06-21 – p.53/67
  54. ( ) ( ) / / — 2021 6-7 —

    2021-06-21 – p.54/67
  55. — ( ) 1. ( ) 2. ( ) 3.

    ( ) — 2021 6-7 — 2021-06-21 – p.55/67
  56. . . . Ethereum https://speakerdeck.com/ks91/introduction-to-bbc-1-and-ethereum-f1a5d202-36fe-4a4f-9536-d01e66d51f83 https://speakerdeck.com/ks91/bbc-1-and-ethereum-exercise-ii-39acc9be-9ec2-4fc1-ad3d-d2cca737fa09 — 2021 6-7 —

    2021-06-21 – p.56/67
  57. → 30 : × — 2021 6-7 — 2021-06-21 –

    p.57/67
  58. OS (2007) — 2021 6-7 — 2021-06-21 – p.58/67

  59. Amazon Go → — 2021 6-7 — 2021-06-21 – p.59/67

  60. ( JPY ) MUFG J S (“Cause-Oriented Economy”) ⇒ —

    2021 6-7 — 2021-06-21 – p.60/67
  61. (4 ) ( ) — 2021 6-7 — 2021-06-21 –

    p.61/67
  62. → (AI ) → ← → → / / —

    2021 6-7 — 2021-06-21 – p.62/67
  63. ( ) ( ) — 2021 6-7 — 2021-06-21 –

    p.63/67
  64. 7. : — 2021 6-7 — 2021-06-21 – p.64/67

  65. 8. — 2021 6-7 — 2021-06-21 – p.65/67

  66. 4. 2021 6 24 ( ) 23:59 JST Waseda Moodle

    (Discord ) — 2021 6-7 — 2021-06-21 – p.66/67
  67. — 2021 6-7 — 2021-06-21 – p.67/67