ブロックチェーン概論 / Overview of Blockchain

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CSO / SFC [email protected] — — 2017-10-13 – p.1/42

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( ) SFC ( ) CSO (Chief Science Ofﬁcer) 1993 ( ) 2006 ( ) SFC 17 P2P (Peer-to-Peer) 2011 → ( ) — — 2017-10-13 – p.2/42

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( R&D, 2017.12) : SF + + 2048 — — 2017-10-13 – p.3/42

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— — 2017-10-13 – p.4/42

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( 19:00∼) 4/11 4/18 4/25 5/9 5/16 5/23 : ( 5F; ) — — 2017-10-13 – p.5/42

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(by Satoshi Nakamoto) Satoshi ( ) (block; , ) (CS ) (chain; ) (CS ) — — 2017-10-13 – p.6/42

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( ) P2P ( ) (double spending) ⇒ ( ) ← — — 2017-10-13 – p.7/42

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( ) (( ) ) ⇓ ⇓ “Code is Law” — — 2017-10-13 – p.8/42

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1) 2) 3) ⇒ ⇒ · / (dependable ) — — 2017-10-13 – p.9/42

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/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 ( ) — — 2017-10-13 – p.10/42

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Beyond Blockchain One (BBc-1) #JUDPJO ͦͷଞͷ ύϒϦοΫϨοδϟʔ BBc-1 ΦʔϓϯͰύϒϦοΫͳɹ෼ࢄϨοδϟʔ ෼ࢄετϨʔδ؅ཧ αʔόϨε ۃྗϝΠϯςφϯεϑϦʔ ͳ࣮ߦ؀ڥ ΞϓϦέʔγϣϯ ͦ ͷ ଞ ͞ · ͟ · ͳ Ξ ϓ Ϧ ͷ Մ ೳ ੑ σδλϧ௨՟ 4%, σδλϧΞηοτ "1* ##D ։ൃ߲໨ ҠߦΞγελϯτ ஍ Ҭ ௨ ՟ Ξ ϓ Ϧ ϙ Π ϯ τ Ξ ϓ Ϧ དྷ ྺ ূ ໌ Ξ ϓ Ϧ ʜ ॳظ λʔήοτ ॳظ λʔήοτ ॳظʹ͓͍ͯଘࡏূ໌Λґଘ ݸʑͷετϨʔδαʔϏε Մೳͳλʔήοτ 2017 10 31 (https://github.com/beyond-blockchain/bbc1) — — 2017-10-13 – p.11/42

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(1) — — — 2017-10-13 – p.12/42

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(2) — RSA, DSA, ECDSA ( DSA; ), etc. RSA ← ( ) — — 2017-10-13 – p.13/42

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( ) 1. 10 ( ) 2. 3. 1 — — 2017-10-13 – p.14/42

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/DLT End-to-End ( ) ( ) — — 2017-10-13 – p.15/42

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( / ) EVM ( ) EVM (Ethereum Virtual Machine) Gas ( CPU ) — — 2017-10-13 – p.16/42

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— — 2017-10-13 – p.17/42

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(Hyperledger ) ( ) ( ) ( ) IoT / / ( , ) — — 2017-10-13 – p.18/42

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: . . . : Proof of Existence, Everledger, Factom, . . . (OP_RETURN ) ( ) ( ) × = — — 2017-10-13 – p.19/42

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( KVS DHT) — — 2017-10-13 – p.20/42

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— — 2017-10-13 – p.21/42

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(2009 1 ∼2018 3 ) 2 → 2 2 → — — 2017-10-13 – p.22/42

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vs. — — 2017-10-13 – p.23/42

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The DAO ( ) The DAO Split ( ) 360 ETH (50∼60 ) (2016/6/17) ( → ) ( → ; ) ( ) (2016/7/20 ) — — 2017-10-13 – p.24/42

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— — 2017-10-13 – p.25/42

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: ⇒ ⇒ — — 2017-10-13 – p.26/42

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Ether Ether Ether . . . BTC Everledger, Factom OAP ⇒ — — 2017-10-13 – p.27/42

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( ) ( ) ( vs. ) ( ) ( ) ( ) ⇒ ( : BBc-1) DLT : : — — 2017-10-13 – p.28/42

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— — 2017-10-13 – p.29/42

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( ) (by ) (since 1984) ( ) ( ) ( ) . . . ( ) — — 2017-10-13 – p.30/42

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( ) ( ) ( ) ( ) ( ) ( ) (by ) — — 2017-10-13 – p.31/42

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Q. ( ) ( = / = ) ⇒ — — 2017-10-13 – p.32/42

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( ) ( ) ( ) — — 2017-10-13 – p.33/42

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( ) / / — — 2017-10-13 – p.34/42

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— 1. ( ) 2. ( ) 3. ( ) — — 2017-10-13 – p.35/42

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→ 30 : × — — 2017-10-13 – p.36/42

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OS (2007) — — 2017-10-13 – p.37/42

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Amazon Go → — — 2017-10-13 – p.38/42

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( JPY ) MUFG J S (“Cause-Oriented Economy”) ⇒ — — 2017-10-13 – p.39/42

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(4 ) ( ) — — 2017-10-13 – p.40/42

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( ) → (AI ) → ← → → / / — — 2017-10-13 – p.41/42

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— — 2017-10-13 – p.42/42