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ブロックチェーンを理解する 〜解説と実演〜 / Understanding Blockchains
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Kenji Saito
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June 07, 2017
Technology
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ブロックチェーンを理解する 〜解説と実演〜 / Understanding Blockchains
2017年6月7日(水)、Interop Tokyo 2017 の同名のセッションにて私用したスライドです。
Kenji Saito
PRO
June 07, 2017
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Transcript
∼ ( 1 ) ∼ SFC
[email protected]
— — 2017-06-07
– p.1/33
( ) SFC ( ) CSO (Chief Science Officer) 1993
M.Eng ( ) 2006 ( ) SFC 16 P2P 2011 → ( ) — — 2017-06-07 – p.2/33
1. 2. 3. 4. 5. — — 2017-06-07 – p.3/33
1. (by Satoshi Nakamoto) Satoshi ( ) (block; , )
(chain; ) — — 2017-06-07 – p.4/33
( ) P2P ( ) (double spending) ⇒ ( )
← — — 2017-06-07 – p.5/33
/ (1) 2,100 cm3 1 1cm3 10 12.5cm3 ⇒ ⇒
( ) — — 2017-06-07 – p.6/33
/ (2) ( ) ( ) ( ) ( )
→ — — 2017-06-07 – p.7/33
End-to-End ( ) ( ) — — 2017-06-07 – p.8/33
2. — — 2017-06-07 – p.9/33
– — — 2017-06-07 – p.10/33
– RSA, DSA, ECDSA ( DSA) ( RSA ← )
PKI — — 2017-06-07 – p.11/33
3. — — 2017-06-07 – p.12/33
— — 2017-06-07 – p.13/33
(1) (= ) → UTXO (Unspent TX Output) UTXO —
— 2017-06-07 – p.14/33
(2) M A 60BTC (SegWit . . . ) —
— 2017-06-07 – p.15/33
— — 2017-06-07 – p.16/33
1. 10 ( ) 2. 3. 1 — — 2017-06-07
– p.17/33
— — 2017-06-07 – p.18/33
21 ( 4 ) ( ) 2,100 BTC 1 1
BTC 2140 20,999,999.9769 BTC — — 2017-06-07 – p.19/33
— — 2017-06-07 – p.20/33
CPU → GPU → FPGA → ASIC ( ) →
→ — — 2017-06-07 – p.21/33
— — 2017-06-07 – p.22/33
POW ( ) Proof Of Work . . . —
— 2017-06-07 – p.23/33
(2014.2-2016.1) — — 2017-06-07 – p.24/33
3 1. ( : UTXO ) ⇒ ( ) 2.
( : ) ⇒ 3. ( : ) TX ⇒ 2 3 — — 2017-06-07 – p.25/33
4. https://blockchain.info/ — — 2017-06-07 – p.26/33
1. 2. — — 2017-06-07 – p.27/33
Proof of Existence ( ) https://proofofexistence.com — — 2017-06-07 –
p.28/33
Proof of Existence ( ) ( ) OP_RETURN OP_RETURN =
⇒ (burn = ( ) ) 0x444f4350524f4f46 (‘DOCPROOF’) SHA-256 5 mBTC (0.005 BTC) — — 2017-06-07 – p.29/33
( KVS DHT) — — 2017-06-07 – p.30/33
5. — — — 2017-06-07 – p.31/33
OS (2007) — — 2017-06-07 – p.32/33
∼ ( 2 ) ∼ (Ethereum) — — 2017-06-07 –
p.33/33