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文库首页开发技术其它Hyperledger fabric towards scalable blockchain for business

Hyperledger fabric towards scalable blockchain for business

Hyperledge

fabric

超级账本

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介绍超级账本（HyperLedger）的资料，并对比了与其它几大技术体系的长短之处。零积分。

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Towards A Novel Architecture for Enabling Interoperability Amongst Multiple Blockchains论文笔记

Hyperledger fabric:

towards scalable blockchain for business

Marko Vukolić, IBM Research - Zurich

Trust in Digital Life

The Hague, Netherlands, June 17 2016

Blockchain – shared, replicated, ledger

Counter-party

records

Bank records

Party C’s Records

Auditor records

Party B Records

Party A’s Records

Ledger

Participants

have possibly

multiple shared

ledgers

Consensus

protocol ensures

ledger replicas

are identical*

What is a Blockchain?

• A chain (sequence) of blocks of transactions

- Each block consists of a number of transactions

• Bitcoin transactions

- simple virtual cryptocurrency transfers

- (address A, address B, amount)

• Transactions do not have to be simple nor related to cryptocurrency

- E.g., smart contracts (Ethereum)

- chaincode (Hyperledger)

#234

#235 #236

…

Genesis

block

Growing Proof-of-Work (PoW)-based Blockchain

§ Block “mining”:

─ Every participant (“miner”) tries to find nonces

─ such that the hash of the block h is lower than a 256-bit target

§ Bitcoin

─ Target dynamically adjusted: 1 block generated roughly every 10 minutes

─ Already in 2014, this required more than 2

expected hashes

#234

…

#235 #236

A =hash of block #236

B = Root hash of

Merkle tree of tx

hashes

C = nonce 1

D = nonce 2

Block #237

Transactions

(payload)

h = hash of Block #237 = SHA256(A||B||C||D)

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