BlockChainJam2018で大石哲之さんが使用したスライドです。 HP：https://blockchainjam.org/

1. Brief History of Blockchain
and New movement

2. Brief history of Blockchain
● Phase1
○ Bitcoin and Altcoins
● Phase 2
○ Bitcoin 2.0 and Ethereum
● Phase 3
○ ICO & Dapps
● Phase 4
○ Highspeed consensus, Layer 2 Technologies, Interchain, DEX

3. Before Bitcoin
E CASH （Late 80’s）
MONDEX （90’s）
Digi Cash （Bunkrupt , 1998）
● Needs Trusted third party to check double spent
● Government can force to close these services

4. Phase 1 Bitcoin & Altcoins (2009)

5. Lite coin(2011 / JUL〜)
Charlie Lee

6. Paramater
Mux Supply Blocktie Hash Algorthm
Bitcoin(2009) 21 Mil 10 min SHA256
Litecoin(2011) 84 Mil 2.5 min Scrypt
Monacoin(2013) 105 Mil 90 s Lyra2RE v2

7. Phase2 Bitcoin 2.0 & Ethereum
● Altcoins
○ money
○ only coin transfer
vs
● 2.0 Platform
○ Asset Issuing
■ Mastercoin, Counterparty, Colored coin (2013)
○ Multi Purpose (Asset, Trade, Nortalization etc) (2013〜2015)
■ Nxt
■ Bitshares
■ NEM

8. 2.0 Ethereum
2.0 Platform
Multi function but not user programable
vs
Ethereum (2015) is:
● Turing complete, virtual machine
● Arbitrary Script
● Solidity (Programing language)

9. dropout genious
Latest

10. Phase 3 ICO&Dapps
First blog article
introducing Ethereum
to Japanese.
(2014 Feb)
First Blog article
introducing Ethereum
ICO (2014 summer)
“イーサリアム”

11. ICO
● Madesafe (2013)
● Storj, Swarm, Ethereum (2014)
● Factom (2015)
only one ICO at quarter
● Auger (2015)
● DAO (2015)
● Waves, Lisk (2015)
● so on…….(you know)
Ethereum has been biggest ICO platform so ever.

12. Ploblems
● Ethereum is almighty but:
○ Slow transaction, High fee
○ Smart contract is buggy, hardly auditable
○ too many Dapp coins on Ethereum
● Blockchain is seemed to be innovative but:
○ Cannot connect each other
○ Lack of scalability
○ Private chain concepts fails

13. Phase 4 New movement
Next movement
● High-speed public consensus protool
○ Pos-BFT
● Decentralized Exchange Protocols
● Inter Blockchain Protocols
● Layer 2 Solutions
○ Lightning network
○ Plasma
○ Pegged Sidechain

14. Why important ?
● Solve existing problem
● Totally new technologies after Ethereum (not ICO, not Dapss, not C&P）
● Blockchains became real use

15. to be update yourself
Please lesten today’s all presentation !