ブロックチェーン連続講義 第2-1回 ブロックチェーン概論 / Blockchain Overview

ブロックチェーンハブ主催で開催している第2期ブロックチェーン連続講義の第1回「ブロックチェーン概論」のスライドです。2016年6月3日(金) に使用しました。

Transcript

1. 2 1 SFC / CSO ks91@sfc.wide.ad.jp — 2016-06-03 – p.1/62
2. ( ) SFC CSO http://twitter.com/ks91020 http://www.facebook.com/ks91media 1993 M.Eng ( ) 2006 ( ) : → — 2016-06-03 – p.2/62
3. (1) (2015) Kindle cf. — 2016-06-03 – p.3/62
4. (2) (2015) Kindle . . . — 2016-06-03 – p.4/62
5. (3) (2016) 3 2 — 2016-06-03 – p.5/62
6. — 2016-06-03 – p.6/62
7. 1. 2. Proof of Work ( ) 3. 4. 5. — 2016-06-03 – p.7/62
8. 1. ( ) — 2016-06-03 – p.8/62
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) — 2016-06-03 – p.9/62
10. - — 2016-06-03 – p.10/62
11. - RSA, DSA, ECDSA ( DSA) ( RSA) PKI — 2016-06-03 – p.11/62
12. ( ) 1. 10 ( ) 2. 3. 1 — 2016-06-03 – p.12/62
13. ( ) M A 60BTC — 2016-06-03 – p.13/62
14. 2. Proof of Work ( ) — 2016-06-03 – p.14/62
15. Proof of Work . . . : Hashcash (1997) SHA-1 20 ( ) 0 1 1 / — 2016-06-03 – p.15/62
16. ( ) — 2016-06-03 – p.16/62
17. ( ) — 2016-06-03 – p.17/62
18. POW Proof Of Work ( ) . . . — 2016-06-03 – p.18/62
19. 2 — 2016-06-03 – p.19/62
20. Proof of Work ( ) 1∼2 ( ) ( → ) ASIC . . . — 2016-06-03 – p.20/62
21. 3. — 2016-06-03 – p.21/62
22. ( ) : . . . : Proof of Existence : : . . . — 2016-06-03 – p.22/62
23. 1 (2015 ) BNY Mellon 4 UBS 4 USAA 5 DBS IBM 5 Barclays Safello 6 Deutsche Bank 8 7 BNP Paribas 7 ING Bank 7 Citi Citicoin 7 R3CEV 30 9 — 2016-06-03 – p.23/62
24. 2 (2015 ) NASDAQ linq Chain.com 6 SWIFT 7 VISA 3 8 — 2016-06-03 – p.24/62
25. 3 (2015 ) FRB IBM 3 5 EBA 5 FinTech 225M 7 (2016 3 ) (2016 5 ) — 2016-06-03 – p.25/62
26. — 2016-06-03 – p.26/62
27. : (1600) (1865) — 2016-06-03 – p.27/62
28. DAC/DAO Distributed/Decentralized Autonomous Corporation/Organization - : . . . — 2016-06-03 – p.28/62
29. OS (2007) — 2016-06-03 – p.29/62
30. OS NPO/NGO — 2016-06-03 – p.30/62
31. . . . — 2016-06-03 – p.31/62
32. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” : — 2016-06-03 – p.32/62
33. OS — 2016-06-03 – p.33/62
34. Uber — 2016-06-03 – p.34/62
35. Uber Uber — 2016-06-03 – p.35/62
36. . . . IoT — 2016-06-03 – p.36/62
37. vs. — 2016-06-03 – p.37/62
38. IoT IoT . . . ( ) I/O EVM ( ) ( ) I/O cf. ADEPT by IBM — 2016-06-03 – p.38/62
39. n = f ( ) — 2016-06-03 – p.39/62
40. n ≥ 3f + 1 P F P > 2F ⇒ — 2016-06-03 – p.40/62
41. f = 1 ⇒ — 2016-06-03 – p.41/62
42. — 2016-06-03 – p.42/62
43. e.g. e.g. (Hyperledger) (by DAH) — 2016-06-03 – p.43/62
44. / , ← 2.0 , NEM ← Chain, eris, mijin, Orb 1 ← ← (DAH) ← Practical Byzantine Fault Tolerance ( ) — 2016-06-03 – p.44/62
45. 4. 2.0 — 2016-06-03 – p.45/62
46. 2.0 BTC ( ) . . . 2.0 — 2016-06-03 – p.46/62
47. NEM (New Economy Movement) — 2016-06-03 – p.47/62
48. Chain NASDAQ eris mijin NEM Orb 1 — 2016-06-03 – p.48/62
49. (Ripple path) A C A B B C A→B→C XRP (Ripple credits) — 2016-06-03 – p.49/62
50. — 2016-06-03 – p.50/62
51. — 2016-06-03 – p.51/62
52. UNL UNL : Unique Node List 1,000 UNL 200 . . . UNL — 2016-06-03 – p.52/62
53. UNL UNL . . . 80% UNL UNL — 2016-06-03 – p.53/62
54. Linux Foundation IBM, Digital Asset Holdings, , , . . . IBM Digital Asset Holdings — 2016-06-03 – p.54/62
55. 5. cf. (civic tech) — 2016-06-03 – p.55/62
56. : : : : — 2016-06-03 – p.56/62
57. NPO/NGO : Google, Microsoft, etc. NPO/NGO ⇒ : (civic tech) — 2016-06-03 – p.57/62
58. — 2016-06-03 – p.58/62
59. , etc. 400 → → — 2016-06-03 – p.59/62
60. — 2016-06-03 – p.60/62
61. 3 1. ⇒ 2. ⇒ 3. TX ⇒ — 2016-06-03 – p.61/62
62. — 2016-06-03 – p.62/62