本文選題：以太坊 + PBFT��； 參考：《東華大學(xué)》2017年碩士論文

【摘要】：隨著2009年比特幣的問世,區(qū)塊鏈技術(shù)也隨之產(chǎn)生。區(qū)塊鏈技術(shù)由于具有去中心化、透明可信任的特點,因此這項技術(shù)也迅速引起了廣大專家學(xué)者的關(guān)注。以太坊作為區(qū)塊鏈技術(shù)的一個實現(xiàn),提供了一個去中心化的應(yīng)用平臺,去中心化的應(yīng)用也隨之產(chǎn)生,區(qū)塊鏈技術(shù)的應(yīng)用也逐漸從最初的金融行業(yè)發(fā)展到各行各業(yè)。近些年來,隨著一些行業(yè)聯(lián)盟成立并嘗試應(yīng)用區(qū)塊鏈技術(shù)解決聯(lián)盟內(nèi)去中心化的問題并初見成效,聯(lián)盟鏈的形式越來越得到企業(yè)的青睞。因此以聯(lián)盟鏈應(yīng)用為背景對區(qū)塊鏈技術(shù)進行研究有著極大的未來價值和現(xiàn)實意義。本文以聯(lián)盟鏈的形式展開對區(qū)塊鏈技術(shù)的研究,針對以太坊在聯(lián)盟鏈應(yīng)用的不足提出相關(guān)改進,并實現(xiàn)了去中心化任務(wù)發(fā)布系統(tǒng),其中系統(tǒng)中任務(wù)發(fā)布者與接受者之間的賞金交易通過區(qū)塊鏈中智能合約實現(xiàn)。本文的主要工作有:(1)以以太坊為例,深入學(xué)習(xí)區(qū)塊鏈相關(guān)技術(shù)與概念,并對區(qū)塊鏈中的數(shù)據(jù)層和共識層深入探討,并引出智能合約相關(guān)概念。(2)針對以太坊區(qū)塊鏈基于工作量證明的共識機制在聯(lián)盟鏈場景下表現(xiàn)出的算力浪費的問題,本文提出采用PBFT共識算法,并針對該共識機制進行改進,通過設(shè)計區(qū)塊生成協(xié)議并結(jié)合超時機制的方法,減少共識過程中的通信開銷。(3)根據(jù)聯(lián)盟鏈的特點,提出對以太坊中賬戶存儲優(yōu)化方案,結(jié)合Merkle Patricia樹的數(shù)據(jù)結(jié)構(gòu)特點,對每筆交易涉及到的兩個賬戶,找到賬戶地址的公共前綴后同時修改兩個賬戶的內(nèi)容,并采用K-means聚類算法將關(guān)聯(lián)賬戶聚類,提高了交易執(zhí)行過程中賬戶修改的效率。(4)對改進后的以太坊進行聯(lián)盟鏈形式的區(qū)塊鏈搭建,并開發(fā)實現(xiàn)了該平臺下的去中心化任務(wù)發(fā)布系統(tǒng),該系統(tǒng)中交易相關(guān)的操作由區(qū)塊鏈完成。
[Abstract]:With the advent of Bitcoin in 2009, blockchain technology also emerged. Because of its characteristics of decentralization, transparency and trustworthiness, blockchain technology has attracted the attention of many experts and scholars. As a realization of block chain technology, etheric workshop provides a decentralized application platform, and the application of block chain technology gradually develops from the initial financial industry to a variety of industries. In recent years, with the establishment of some trade alliances and try to use block chain technology to solve the problem of decentralization in the alliance and initial results, the form of alliance chain is becoming more and more popular among enterprises. Therefore, it is of great value and practical significance to study the block chain technology based on the application of alliance chain. In this paper, the research of block chain technology is carried out in the form of alliance chain, aiming at the deficiency of the application of Ethernet Fong in alliance chain, the related improvement is put forward, and the decentralized task publishing system is implemented. The reward transaction between the task publisher and the receiver in the system is realized through the intelligent contract in the block chain. The main work of this paper is as follows: (1) take the etheric workshop as an example, deeply study the technology and concept of block chain, and discuss the data layer and consensus layer in the block chain. And leads to the concept of intelligent contract. (2) aiming at the problem of waste of computing power in the alliance chain scenario, this paper proposes a PBFT consensus algorithm, and improves the consensus mechanism. By designing block generation protocol and combining with timeout mechanism, the communication overhead in consensus process is reduced. (3) according to the characteristics of alliance chain, we propose an optimized scheme for account storage in etheric workshop, and combine the data structure of Merkle Patricia tree. For the two accounts involved in each transaction, after finding the common prefix of the account address, the contents of the two accounts are modified simultaneously, and K-means clustering algorithm is used to cluster the associated accounts. It improves the efficiency of account modification in the course of transaction execution. (4) the improved etheric workshop is constructed in the form of alliance chain, and a decentralized task publishing system is developed and implemented under the platform. The transaction-related operations in the system are accomplished by the block chain.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：F49;TP311.13

【相似文獻】

相關(guān)碩士學(xué)位論文 前5條

1 陳何清;基于區(qū)塊鏈的IMIX傳輸系統(tǒng)的設(shè)計與實現(xiàn)[D];南京大學(xué);2016年

2 滕達;基于個人電腦的比特幣數(shù)據(jù)統(tǒng)計系統(tǒng)[D];山東大學(xué);2016年

3 夏新岳;基于區(qū)塊鏈的股權(quán)資產(chǎn)購買和轉(zhuǎn)贈設(shè)計與實現(xiàn)[D];內(nèi)蒙古大學(xué);2016年

4 鄭康;A公司消費類數(shù)字資產(chǎn)流通平臺商業(yè)模式與營銷策略研究[D];南京大學(xué);2016年

5 安慶文;基于區(qū)塊鏈的去中心化交易關(guān)鍵技術(shù)研究及應(yīng)用[D];東華大學(xué);2017年

，

本文編號：2109128