物聯網（IoT）帶來了大量的計算數據分析，並逐漸改變了當前之產業。這種現象使世界比以前更方便，許多行業通過大量的訓練以及測試程序轉移到數位資料處理以及數據分析。除此之外，一經濟周期的時間比以前減少。通過物聯網技術，人們可以在不受距離限制的情況下輕鬆獲取數據，而許多公司致力於大數據預測趨勢是常見的。由於城市發展非常快速，近年來資源也逐漸受飽和，共享經濟的導入，獨角獸公司開始出現在市場中。而共享經濟足以解釋如何將該行業與物聯網技術相結合。它可以跟踪用戶並及時預測用戶在系統中之習慣。但在物聯網技術和共享經濟下仍存在一些風險。
對於物聯網技術，用戶無法確保輸入數據是正確的，也無法跟踪數據來源。因此，它會發生一些問題，任何人都可以更改數據。這個問題對於某些應用來說至關重要，例如，食品安全是用戶現在非常重視的問題。此外，物聯網技術支持的共享經濟沒有信任機制。用戶也是唯一一個信任機制。用戶的評論支持信任機制，但仍需要考慮其正確性。
因此，本文利用共享空間目的引入區塊鏈技術來存儲物聯網數據，構建共享經濟的新型商業模式，有效地利用資源。此外，基於本論文的思想，用戶可以直接向用戶執行交易，而無需使用區塊鏈技術的任何一方。本論文的另一個核心價值是使用智能合約來連接區塊鍊和物聯網。此外，本文將解釋如何設計智能合約的內容，讓整個處理變得更加順暢。

Internet of Things (IoT) brings numerous computational data analysis and change the current industries gradually. This phenomenon makes the world be more convenient than before and many industries transfers to digital document processing and data analysis using lots of training and testing with program. Moreover, the time for one cycle of economy is decreasing than before. Through the IoT technology, people can get the data very easy without the distance limitation. Many companies work on the big data to predict the trend is common. Since the city development is very fast, the resource is gradually limited in recent years as well. Some unicorn companies start to appear in the world these serval years. The sharing economy sufficient explain how to combine this industry with the IoT technology. It can track the user and predict user’s habit in the system timely. However, there still have some risks under the IoT technology and the sharing economy.
For the IoT technology, user cannot ensure the input data is correct and cannot track the source of the data. Therefore, it would happen some problem, which it can be, changed the data by anyone. This problem is critical for some applications, for example, food security is the issue which user pays an importance now. In addition, the sharing economy supported by the IoT technology do not have a trust mechanism. User makes the only one trust mechanism as well. The comment by user support the trust mechanism but this still need to consider about its correctness.
So that, this thesis use sharing space to purpose introducing the blockchain technology to store the data from the IoT and build the novel business model of sharing economy for utilizing the resource sufficiently. In addition, based on the idea of this thesis, user can execute the transaction to user directly without any party using features of the blockchain technology. Another core value of this thesis is using smart contract to connect with blockchain and IoT. Moreover, this thesis will explain how to design the content of smart contract and let whole processing become more smoothly.

1. Demailly, D. and A.-S. Novel, The sharing economy: make it sustainable. Studies, 2014. 3: p. 14-30.
2. Uhlemann, T.H.-J., C. Lehmann, and R.J.P.C. Steinhilper, The digital twin: Realizing the cyber-physical production system for industry 4.0. 2017. 61: p. 335-340.
3. YouBike. 2009; Available from: https://www.youbike.com.tw/.
4. 陳君毅. 讓台北成為智慧共享城市！國內、外共享業者齊聚，力推共享經濟浪潮改變臺灣競爭力. 2017; Available from: https://buzzorange.com/techorange/2017/11/15/sharing-cities-summit-2/.
5. USPACE. USPACE. 2017; Available from: https://www.uspace.city.
6. nesta, The titans of the sharing economy meet their match. 2016.
7. Conoscenti, M., A. Vetro, and J.C. De Martin. Blockchain for the Internet of Things: A systematic literature review. in 2016 IEEE/ACS 13th International Conference of Computer Systems and Applications (AICCSA). 2017. IEEE.
8. Nakamoto, S., Bitcoin: A peer-to-peer electronic cash system. 2008.
9. Christidis, K. and M. Devetsikiotis, Blockchains and smart contracts for the internet of things. Ieee Access, 2016. 4: p. 2292-2303.
10. Buterin, V., A next-generation smart contract and decentralized application platform. white paper, 2014.
11. Yu, Y., et al., Blockchain-Based Solutions to Security and Privacy Issues in the Internet of Things. IEEE Wireless Communications, 2018. 25(6): p. 12-18.
12. Solidity, Solidity.
13. How to make smart contracts upgradable! 2018, Sep 10; Available from: https://hackernoon.com/how-to-make-smart-contracts-upgradable-2612e771d5a2.
14. Liu, P.T.S. Medical record system using blockchain, big data and tokenization. in International conference on information and communications security. 2016. Springer.
15. E-estonia. E-estonia.com. Available from: E-estonia.
16. Sullivan, C. and E. Burger, E-residency and blockchain. computer law & security review, 2017. 33(4): p. 470-481.
17. Education, E.D.A.T.O.o.U. Digital Diploma debuts at MIT. October 17, 2017; Available from: http://news.mit.edu/2017/mit-debuts-secure-digital-diploma-using-bitcoin-blockchain-technology-1017.
18. Reyna, A., et al., On blockchain and its integration with IoT. Challenges and opportunities. Future Generation Computer Systems, 2018. 88: p. 173-190.
19. Liu, X., et al., A security framework for the internet of things in the future internet architecture. Future Internet, 2017. 9(3): p. 27.
20. Cha, S.-C., et al. Privacy-aware and blockchain connected gateways for users to access legacy IoT devices. in 2017 IEEE 6th Global Conference on Consumer Electronics (GCCE). 2017. IEEE.
21. Dorri, A., et al. Blockchain for IoT security and privacy: The case study of a smart home. in 2017 IEEE international conference on pervasive computing and communications workshops (PerCom workshops). 2017. IEEE.
22. Alcarria, R., et al., A Blockchain-Based Authorization System for Trustworthy Resource Monitoring and Trading in Smart Communities. Sensors, 2018. 18(10): p. 3561.
23. Wang, J., et al., A blockchain based privacy-preserving incentive mechanism in crowdsensing applications. IEEE Access, 2018. 6: p. 17545-17556.
24. wiki. 台灣食品安全事件列表. 2013; Available from: https://zh.wikipedia.org/wiki/%E5%8F%B0%E7%81%A3%E9%A3%9F%E5%93%81%E5%AE%89%E5%85%A8%E4%BA%8B%E4%BB%B6%E5%88%97%E8%A1%A8.
25. Kshetri, N., 1 Blockchain’s roles in meeting key supply chain management objectives. International Journal of Information Management, 2018. 39: p. 80-89.
26. Wu, L., et al. Democratic centralism: A hybrid blockchain architecture and its applications in energy internet. in 2017 IEEE International Conference on Energy Internet (ICEI). 2017. IEEE.
27. Mengelkamp, E., et al., A blockchain-based smart grid: towards sustainable local energy markets. Computer Science-Research and Development, 2018. 33(1-2): p. 207-214.
28. Thomas, L., et al., Automation of the supplier role in the GB power system using blockchain-based smart contracts. CIRED-Open Access Proceedings Journal, 2017. 2017(1): p. 2619-2623.
29. Solidity. Solidity Assembly. Available from: https://solidity.readthedocs.io/en/v0.5.3/assembly.html#inline-assembly.
30. Lu, A. Solidity DelegateProxy Contracts. 2018 May 18; Available from: https://blog.gnosis.pm/solidity-delegateproxy-contracts-e09957d0f201.