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Introducing the Blockchain and Distributed Ledger Technology

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Flowchain workshop - 30 minutes talks for introducing the blockchain and distributed ledger technology.

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Introducing the Blockchain and Distributed Ledger Technology

  1. 1. Introducing the Blockchain and Distributed Ledger Technology Jollen <jollen@jollen.org> Founder, Flowchain.io https://flowchain.io 2017.3.4, 19:00~19:30 @BTOSS Workshop 1
  2. 2. • A distributed ledger designed for the Internet of Things • A programming framework and open source project • Architecture designed from the ground up • White paper and more information: • https://flowchain.io Flowchain 2
  3. 3. Preliminary 3
  4. 4. 4 Ethereum Bitcoin Hyperledger Ripple R3 4
  5. 5. "Colored Coins" loosely describes a class of methods for representing and managing real world assets on top of the Bitcoin Blockchain [1]. [1]: https://en.bitcoin.it/wiki/Colored_Coins Color Coins 5 5
  6. 6. Public Private Mining Consensus HyperLedger Bitcoin Blockchain 分類 6 6
  7. 7. 1.0 2.0 3.0 FinTech and Cryptocurrency Non-fintech Distributed ledger Blockchain Industry 7
  8. 8. Distributed Ledger Technology • A Blockchain is only one type of data structure considered to be a distributed ledger. [1] • DLT 可以延⽤用 Blockchain 資料結構設計,或根據應⽤用 的不同,設計全新的資料結構 • ⺫⽬目標:提供⼀一個分散式、安全且可信任的資料儲存系 統(data storage) [1]: https://en.wikipedia.org/wiki/Distributed_ledger 8
  9. 9. Distributed Ledger Blockchain 9
  10. 10. PreviousHash Timestamp MerkleRoot Nonce Block #11211 PreviousHash Timestamp MerkleRoot Nonce Block #11212 PreviousHash Timestamp MerkleRoot Nonce Block #11213 Merkle tree ⽤用來紀錄這個區塊裡的 transactions Blockchain Data Structure 10
  11. 11. Blockchain Data Structure • ordered, back-linked list • stored in a flat file or database • each block is identified by a hash • SHA256 11
  12. 12. PreviousHash Timestamp MerkleRoot Nonce Genesis Block /* * 定義我的 Genesis Block */ var genesisBlock = { hash: '', prevHash: '0000000000000000000000000000000000000000000000000000000000000000', timestamp: new Date(), merkleRoot: 'undefined' }; Establish Genesis Block 12
  13. 13. Source: https://www.ft.com/content/eb1f8256-7b4b-11e5-a1fe-567b37f80b64#axzz3qe4rV5dH How a Blockchain Works 13
  14. 14. DLT Essentials • A peer-to-peer network • Consensus algorithms 14
  15. 15. Consensus Algorithms #1 • proof-of-work • proof-of-stake • proof-of [resource|existance|status|state|relibility|…] • hybrid 15
  16. 16. Consensus Algorithms #2 • PBFT (Practical Byzantine Fault Tolerance - 拜占庭容 錯算法) • Paxos / The Part-Time Parliament (希臘城邦算法) • DPoS (Delegate Proof of Stake) 16
  17. 17. Contact Email White Paper Facebook jollen@jollen.org https://flowchain.io https://facebook.com/groups/wotcity

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