政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/113293

政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/113293

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政大典藏 > College of Informatics > Department of Computer Science > Theses > Item 140.119/113293

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/113293

Title:	分散式環境中基於聲譽的信任度評估機制及其在智能合約之應用 Reputation-based Trust Evaluation Mechanism for Decentralized Environments and It’s Application Based on Smart Contracts
Authors:	詹琨泰 Chan, Kun-Tai
Contributors:	左瑞麟 Tso, Raylin 詹琨泰 Chan, Kun-Tai
Keywords:	區塊鏈去中心化 PGP 智能合約小世界理論信任度 Blockchain Decentralized PGP Smart contract The Small World Problem Trust degree
Date:	2017
Issue Date:	2017-10-02 10:16:16 (UTC+8)
Abstract:	近年來區塊鏈技術及其相關應用成為熱門焦點，區塊鏈最大的特色包含去中心化以及匿名性等特性，然而在這樣的分散式網路中我們很難判斷對方是否值得信賴，在數位憑證中我們透過可信賴第三方擔任憑證中心為用戶簽發金鑰憑證以此建立用戶之間的信賴關係，但在區塊鏈此種分散式網路中找到一個可信賴第三方實屬不易，並且可能會與區塊鏈去中心化之特性背道而馳，因此本研究參考PGP信任網與小世界理論的概念，建立一套可適用於分散式環境中基於聲譽的信任度評估機制，並將此機制結合智能合約實現一個信任度評估機制購物平台，目的希望用戶與陌生人交易前，可透過此機制計算出信任度，提供用戶做為參考，幫助用戶更容易判斷陌生人是否可信，以降低受騙風險。 In recent years, the blockchain technology and its relevant applications become hot spots. The greatest feature of the blockchain is the decentralization. Nonetheless, it is difficult for us to judge whether the other person get involved in the decentralized network is credible. Furthermore, it is difficult to find a reliable third party in such a point-to-point network. Consequently, this paper refers to the PGP web of trust and the small world problem to establish a set of reputation-based trust evaluation mechanism for decentralized environments, we combine this mechanism with a smart contract to achieve a trust evaluation mechanism shopping platform, It is expected that achievements of the paper can facilitate people’s judgment regarding the reliability of strangers and reduce the risks of being deceived.
Reference:	[1] Garfinkel, S. (1995). PGP: pretty good privacy. " O`Reilly Media, Inc." [2] Zyskind, G., & Nathan, O. (2015, May). Decentralizing privacy: Using blockchain to protect personal data. In Security and Privacy Workshops (SPW), 2015 IEEE (pp. 180-184). IEEE. [3] Zhang, F., Cecchetti, E., Croman, K., Juels, A., & Shi, E. (2016, October). Town crier: An authenticated data feed for smart contracts. In Proceedings of the 2016 ACM SIGSAC Conference on Computer and Communications Security(pp. 270-282). ACM. [4] Travers, J., & Milgram, S. (1967). The small world problem. Phychology Today, 1, 61-67. [5] Nakamoto, S. (2008). Bitcoin: A peer-to-peer electronic cash system. [6] Andrychowicz, M., Dziembowski, S., Malinowski, D., &Mazurek, L. (2014, May). Secure multiparty computations on bitcoin. In Security and Privacy (SP), 2014 IEEE Symposium on (pp. 443-458). IEEE. [7] Li,Y. M., Chen, J. C.,&Li, T. Y.(2007, May). A Blog System with Trust Mechanism.18th International Conference on Information Management. [8] Meng, X. F., Zhang, L., & Wang, X. (2009). Research on trust model of P2P electronic commerce [J]. Application Research of Computers, 8, 077. [9] Qiao, X. Q., Yang, C., Li, X. F., & Chen, J. L. (2011). A trust calculating algorithm based on social networking service users` context. JisuanjiXuebao(Chinese Journal of Computers), 34(12), 2403-2413. [10] Gao,Y.,&Yuan, Y. (2014). The Research on Global Trust Algorithm Based on Social Network.from: http://www.paper.edu.cn. [11] 許鑫, &翟曉娟. (2008). 信任度計算與信任傳遞協議設計的研究. 現代圖書情報技術, 24(3),(pp. 32-39). [12] Recommendation-for-Key-Management-Part1: General , from:http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r4.pdf [13] 智能合約-MBA智庫百科, from:http://wiki.mbalib.com/zh-tw/%E6%99%BA%E8%83%BD%E5%90%8 8%E7%BA%A6 [14] Facebook research, from: https://research.fb.com/three-and-a-half-degrees-of-separation/?hc_ location=ufi [15]Heineman, G. T., Pollice, G., &Selkow, S. Algorithms in a Nutshell, Oreilly Media. ISBN 978-0-596-51624-6. [16] Stallings, W., &Tahiliani, M. P. (2014). Cryptography and network security: principles and practice (Vol. 6). London: Pearson. [17]結城浩.(2011). 密碼學與網路安全應用.旗標出版股份有限公司. [18]林展民.(2016). 以智能合約實現快速醫療保險理賠.國立政治大學資訊科學系碩士論文.
Description:	碩士國立政治大學資訊科學學系 104753006
Source URI:	http://thesis.lib.nccu.edu.tw/record/#G0104753006
Data Type:	thesis
Appears in Collections:	[Department of Computer Science ] Theses

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