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ブロックチェーン概論 / Overview of Blockchain
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Kenji Saito
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September 05, 2018
Technology
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ブロックチェーン概論 / Overview of Blockchain
2018年9月5日(水)、ブロックチェーンハブ主催で開催されたブロックチェーンアカデミー「ブロックチェーン概論」にて使用したスライドです。
Kenji Saito
PRO
September 05, 2018
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Transcript
CSO / SFC
[email protected]
— — 2018-09-05 – p.1/42
( ) SFC ( ) CSO (Chief Science Officer) 1993
( ) 2006 ( ) SFC 18 P2P (Peer-to-Peer) 2011 → ( ) — — 2018-09-05 – p.2/42
(2017) : SF + + SF (2048 ) 2048 —
— 2018-09-05 – p.3/42
— — 2018-09-05 – p.4/42
(by Satoshi Nakamoto) Satoshi ( ) (block; , ) (CS
) (chain; ) (CS ) — — 2018-09-05 – p.5/42
( ) P2P ( ) (double spending) ⇒ ( )
← — — 2018-09-05 – p.6/42
( ) (( ) ) ⇓ ⇓ “Code is Law”
— — 2018-09-05 – p.7/42
1) 2) 3) ⇒ ⇒ · / (dependable ) —
— 2018-09-05 – p.8/42
/DLT(Distributed Ledger Technology) ( ) Bitcoin ( ) Open Assets
Protocol (OAP) ( ) Ethereum ( ) ( ) Enterprise Ethereum Alliance (↓ ) ( / DLT) ( ) Hyperledger (Linux Foundation) Fabric (IBM/DAH), Sawtooth (Intel), Iroha ( ) Corda (R3), Tangle (IOTA), BBc-1 ( ) — — 2018-09-05 – p.9/42
Beyond Blockchain One (BBc-1) ( ) #JUDPJO ##D$PSF ϨοδϟʔαϒγεςϜ ΞϓϦέʔγϣϯ
ͦ ͷ ଞ ͞ · ͟ · ͳ Ξ ϓ Ϧ ͷ Մ ೳ ੑ ڞ௨ϥΠϒϥϦ ##D ։ൃ߲ Ҭ ௨ ՟ Ξ ϓ Ϧ ϙ Π ϯ τ Ξ ϓ Ϧ དྷ ྺ ূ ໌ Ξ ϓ Ϧ ʜ ॳظʹ͓͍ͯଘࡏূ໌Λґଘ ΞϯΧϦϯά ֤ϊʔυʹ͓͚Δهʹ ֤छσʔλϕʔεΛར༻Մೳ TRMJUF.Z42-ͦͷଞ%# BBc-1 σδλϧ௨՟ϥΠϒϥϦ ͦͷଞͷϥΠϒϥϦ Bitcoin Ethereum ( ) ( ) — — 2018-09-05 – p.10/42
(1) — — — 2018-09-05 – p.11/42
(2) — RSA, DSA, ECDSA ( DSA; ), etc. RSA
← ( ) — — 2018-09-05 – p.12/42
( ) 1. 10 ( ) 2. 3. 1 —
— 2018-09-05 – p.13/42
ਖ਼ੑͷอূ ྫ6590ߏͱσδλϧॺ໊ ଘࡏੑͷূ໌ ྫ࡞ۀূ໌͖ϋογϡνΣʔϯ །Ұੑͷ߹ҙ ྫφΧϞτɾίϯηϯαε ϧʔϧͷهड़ ྫ#5$ͷҠస ɾ τϥϯβΫγϣϯͷ༰͕վ͟ΜͰ͖ͣɺ
ɾ ͦͷΞηοτʹؔ͢ΔաڈͷτϥϯβΫγϣϯྻʹরΒͯ͠ໃ६͕ͳ͘ɺ ɾ ͔ͭɺਖ਼ͳϢʔβʹΑΓೖ͞Ε͍ͯΔ͜ͱΛอূ͢Δ ɾաڈʹ͋ͬͨτϥϯβΫγϣϯͷূڌΛຣফͰ͖ͣɺ ɾ ͔ͭɺաڈʹͳ͔ͬͨτϥϯβΫγϣϯͷূڌΛ፻Ͱ͖ͳ͍ ɾໃ६͢Δ;ͨͭͷτϥϯβΫγϣϯ͕ೖ͞Εͨ߹ɺ ɹ ͍ͣΕ ؔ༩͢Δશһ͕ಉ͡ยํΛબΜͰྺ࢙ͷதʹҐஔ͚ͮΔ ɾΞϓϦέʔγϣϯϩδοΫ Կ͕ਖ਼͍͠τϥϯβΫγϣϯ͔ΛܾΊΔ — — 2018-09-05 – p.14/42
( / ) EVM ( ) EVM (Ethereum Virtual Machine)
Gas ( CPU ) — — 2018-09-05 – p.15/42
— — 2018-09-05 – p.16/42
(Hyperledger ) ( ) ( ) ( ) IoT /
/ ( , ) — — 2018-09-05 – p.17/42
: . . . : Proof of Existence, Everledger, Factom,
. . . (OP_RETURN ) ( ) ( ) / × = — — 2018-09-05 – p.18/42
( KVS DHT) — — 2018-09-05 – p.19/42
— — 2018-09-05 – p.20/42
(2009 1 ∼2018 8 ) 2 → 2 2 →
— — 2018-09-05 – p.21/42
vs. — — 2018-09-05 – p.22/42
The DAO ( ) The DAO Split ( ) 360
ETH (50∼60 ) (2016/6/17) ( → ) ( → ; ) ( ) (2016/7/20 ) — — 2018-09-05 – p.23/42
— — 2018-09-05 – p.24/42
: ⇒ ⇒ — — 2018-09-05 – p.25/42
Ether Ether Ether . . . BTC Everledger, Factom OAP
⇒ — — 2018-09-05 – p.26/42
( ) ( ) ( vs. ) ( ) (
) ( ) ⇒ ( : BBc-1) DLT : : — — 2018-09-05 – p.27/42
/DLT Bitcoin, Ethereum DLT BBc-1 ( ) ( ) (
) ( ) ( ) ( ) ( ) ( ) ( ) Ethereum ( ) ( ) — — 2018-09-05 – p.28/42
C V C ≥ V Bitcoin ( ) bitcoin Bitcoin
( ) Ethereum DLT ( ) BBc-1 ( ) ( ) C ≥ V (proactive) (introspection ( ) ) ( ) — — 2018-09-05 – p.29/42
— — 2018-09-05 – p.30/42
( ) (by ) (since 1984) ( ) ( )
( ) . . . ( ) — — 2018-09-05 – p.31/42
( ) ( ) ( ) ( ) ( )
( ) (by ) — — 2018-09-05 – p.32/42
Q. ( ) ( = / = ) ⇒ —
— 2018-09-05 – p.33/42
( ) ( ) ( ) — — 2018-09-05 –
p.34/42
( ) / / — — 2018-09-05 – p.35/42
— 1. ( ) 2. ( ) 3. ( )
— — 2018-09-05 – p.36/42
→ 30 : × — — 2018-09-05 – p.37/42
Amazon Go → — — 2018-09-05 – p.38/42
( JPY ) MUFG J S (“Cause-Oriented Economy”) ⇒ —
— 2018-09-05 – p.39/42
(4 ) ( ) — — 2018-09-05 – p.40/42
( ) → (AI ) → ← → → /
/ — — 2018-09-05 – p.41/42
— — 2018-09-05 – p.42/42