$30 off During Our Annual Pro Sale. View Details »

ブロックチェーン技術の応用可能性・不可能性と新たな社会基盤 / Possible Applications and Impossibilities of Blockchain Technology and the New Social Infrastructure

ブロックチェーン技術の応用可能性・不可能性と新たな社会基盤 / Possible Applications and Impossibilities of Blockchain Technology and the New Social Infrastructure

2016年7月19日、沖縄オープンラボ SDSG (Service Design Study Group) セミナーでの講演およびワークショップに用いたスライドです。

Kenji Saito
PRO

July 19, 2016
Tweet

More Decks by Kenji Saito

Other Decks in Technology

Transcript

  1. SFC – 2016-07-19 – p.1/58

  2. ( ) (ks91@sfc.wide.ad.jp) SFC ( ) CSO (Chief Science Officer)

    1993 M.Eng ( ) 2006 ( ) DMC SFC 15 P2P ⇒ – 2016-07-19 – p.2/58
  3. (2016) 3 2 – 2016-07-19 – p.3/58

  4. 2008 – 2016-07-19 – p.4/58

  5. 1. 10 2. 3. 4. 1. 2. – 2016-07-19 –

    p.5/58
  6. 10 – 2016-07-19 – p.6/58

  7. 1. 10 FinTech/LegalTech : Financial/Legal Technology ⇒ ⇒ – 2016-07-19

    – p.7/58
  8. 2. ( ) ( ) – 2016-07-19 – p.8/58

  9. ( ) ( ) ← (TX) (TX) ← ( :

    ) ( ) “A timestamp server works by taking a hash of a block of items to be timestamped and widely publishing the hash, such as in a newspaper or Usenet post” “To implement a distributed timestamp server on a peer-to-peer basis, we will need to use a proof-of-work system similar to Adam Back’s Hashcash, rather than newspaper or Usenet posts” – Satoshi Nakamoto (2008) – 2016-07-19 – p.9/58
  10. - – 2016-07-19 – p.10/58

  11. - RSA, DSA, ECDSA ( DSA) ( RSA ) PKI

    – 2016-07-19 – p.11/58
  12. ( ) 1. 10 ( ) 2. 3. 1 –

    2016-07-19 – p.12/58
  13. ( ) M A 60BTC – 2016-07-19 – p.13/58

  14. Proof of Work : Hashcash (1997) SHA-1 20 ( )

    0 1 1 / – 2016-07-19 – p.14/58
  15. ( ) – 2016-07-19 – p.15/58

  16. ( ) – 2016-07-19 – p.16/58

  17. POW Proof Of Work ( ) . . . .

    . . – 2016-07-19 – p.17/58
  18. (2014-2016) – 2016-07-19 – p.18/58

  19. End-to-End ( ) ( ) : – 2016-07-19 – p.19/58

  20. 3 1. ⇒ 2. ⇒ 3. TX ⇒ – 2016-07-19

    – p.20/58
  21. 3. OS – 2016-07-19 – p.21/58

  22. (Hyperledger ) ( ) ( ) ( ) IoT /

    / – 2016-07-19 – p.22/58
  23. ( ) : . . . : Proof of Existence

    : : . . . – 2016-07-19 – p.23/58
  24. – 2016-07-19 – p.24/58

  25. : (1600) (1865) – 2016-07-19 – p.25/58

  26. DAC/DAO Distributed/Decentralized Autonomous Corporation/Organization - : . . . –

    2016-07-19 – p.26/58
  27. OS (2007) – 2016-07-19 – p.27/58

  28. OS 10 FinTech/LegalTech NPO/NGO – 2016-07-19 – p.28/58

  29. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT

    & DECENTRALIZED APPLICATION PLATFORM” : – 2016-07-19 – p.29/58
  30. 4. vs. The DAO – 2016-07-19 – p.30/58

  31. vs. – 2016-07-19 – p.31/58

  32. IoT IoT . . . ( ) I/O EVM (

    ) ( ) . . . I/O cf. ADEPT by IBM ( ) – 2016-07-19 – p.32/58
  33. – 2016-07-19 – p.33/58

  34. The DAO The DAO Split ( ) 360 ETH (6/17)

    ( ) ( ; ) – 2016-07-19 – p.34/58
  35. e.g. e.g. (Hyperledger) (Fabric) PBFT (Practical Byzantine Fault Tolerance) e.g.

    Chain Open Standard SBFT (Simple Byzantine Fault Tolerance) ( ) – 2016-07-19 – p.35/58
  36. / , ← 2.0 , NEM ← eris, mijin, Orb

    1 ← ← (Fabric), Chain OS ← (Practical) BFT ( ) – 2016-07-19 – p.36/58
  37. (?) R3 Corda ( ) iota/tangle (IoT ) iota :

    IoT , tangle : ; – 2016-07-19 – p.37/58
  38. OK ⇒ – 2016-07-19 – p.38/58

  39. — – 2016-07-19 – p.39/58

  40. – 2016-07-19 – p.40/58

  41. ( ) ( ) ( ) ( ) ( )

    ( ) ( ) 4 – 2016-07-19 – p.41/58
  42. – 2016-07-19 – p.42/58

  43. 1,000 ( ) 500 (SFC ) – 2016-07-19 – p.43/58

  44. (1) 1. (4-5 ) (20 ) – 2016-07-19 – p.44/58

  45. (2) 2. – 2016-07-19 – p.45/58

  46. (3) 3. – 2016-07-19 – p.46/58

  47. (4) 4. 3 – 2016-07-19 – p.47/58

  48. ( 1 ) – 2016-07-19 – p.48/58

  49. 4 – 2016-07-19 – p.49/58

  50. : ( ) – 2016-07-19 – p.50/58

  51. 1 (15 ) : / / / / / /

    – 2016-07-19 – p.51/58
  52. – 2016-07-19 – p.52/58

  53. 2 (15 ) 5 1 OK : / / /

    / / / – 2016-07-19 – p.53/58
  54. – 2016-07-19 – p.54/58

  55. 3 (15 ) 5 2 OK : / / /

    / / – 2016-07-19 – p.55/58
  56. 2. – 2016-07-19 – p.56/58

  57. (5 ) (3 ) – 2016-07-19 – p.57/58

  58. : , , , 2009 – 2016-07-19 – p.58/58