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。

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