ブロックチェーン概論 / Overview of Blockchains

2017年10月18日(火)、ブロックチェーンアカデミー「スマートコントラクトプログラミング講座(1)」にて使用のスライドです。

Transcript

1. (1) CSO / SFC ks91@sfc.wide.ad.jp – (1) – 2017-10-18 – p.1/34
2. 1. 2. 3. 4. 5. https://www.blockchainacademy.jp/lecture_material/ – (1) – 2017-10-18 – p.2/34
3. 1. – (1) – 2017-10-18 – p.3/34
4. 1) 2) 3) ⇒ – (1) – 2017-10-18 – p.4/34
5. ( ) ( ) ← ← (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) – (1) – 2017-10-18 – p.5/34
6. ( ) P2P ( ) (double spending) ( ) ⇒ ( ) → ( ) ( ) – (1) – 2017-10-18 – p.6/34
7. / (1) 2,100 cm3 1 1cm3 10 12.5cm3 ⇒ ⇒ ( ) – (1) – 2017-10-18 – p.7/34
8. / (2) ( ) ( ) ( ) ( ) ( ) ( ) → ( ) – (1) – 2017-10-18 – p.8/34
9. End-to-End ( ) ( ) – (1) – 2017-10-18 – p.9/34
10. 2. – (1) – 2017-10-18 – p.10/34
11. 10 BcH BcH : Blockchain Hours 1) 2) – (1) – 2017-10-18 – p.11/34
12. ⇒ – (1) – 2017-10-18 – p.12/34
13. 3. – (1) – 2017-10-18 – p.13/34
14. – – (1) – 2017-10-18 – p.14/34
15. – RSA, DSA, ECDSA ( DSA) ( RSA ← ) PKI – (1) – 2017-10-18 – p.15/34
16. 4. – (1) – 2017-10-18 – p.16/34
17. – (1) – 2017-10-18 – p.17/34
18. (1) (= ) → UTXO (Unspent TX Output) UTXO – (1) – 2017-10-18 – p.18/34
19. (2) M A 60BTC SegWit – (1) – 2017-10-18 – p.19/34
20. – (1) – 2017-10-18 – p.20/34
21. 1. 10 ( ) 2. 3. 1 – (1) – 2017-10-18 – p.21/34
22. – (1) – 2017-10-18 – p.22/34
23. 21 ( 4 ) ( ) 2,100 BTC 1 1 BTC 2140 20,999,999.9769 BTC – (1) – 2017-10-18 – p.23/34
24. – (1) – 2017-10-18 – p.24/34
25. CPU → GPU → FPGA → ASIC ( ) → → – (1) – 2017-10-18 – p.25/34
26. – (1) – 2017-10-18 – p.26/34
27. POW ( ) Proof Of Work . . . – (1) – 2017-10-18 – p.27/34
28. (2014 2 ∼2016 1 ) 2 → 2 2 → – (1) – 2017-10-18 – p.28/34
29. 3 1. ( : UTXO ) ⇒ ( ) 2. ( : ) ⇒ 3. ( : ) TX ⇒ 2 3 – (1) – 2017-10-18 – p.29/34
30. 5. https://blockchain.info/ – (1) – 2017-10-18 – p.30/34
31. 1. 2. – (1) – 2017-10-18 – p.31/34
32. Proof of Existence ( ) https://proofofexistence.com – (1) – 2017-10-18 – p.32/34
33. Proof of Existence ( ) ( ) OP_RETURN OP_RETURN = ⇒ (burn = ( ) ) 0x444f4350524f4f46 (‘DOCPROOF’) SHA-256 5 mBTC (0.005 BTC) – (1) – 2017-10-18 – p.33/34
34. (Ethereum) macOS (High Sierra 10.13) + Homebrew + pyenv Linux (Ubuntu 16.04) Windows 10 (Creators Update) + Bash on Ubuntu on Windows http://populus.readthedocs.io/en/latest/quickstart.html – (1) – 2017-10-18 – p.34/34