Controllable and Trustworthy Blockchain-based Cloud Data Management

Presentation on theme: "Controllable and Trustworthy Blockchain-based Cloud Data Management"— Presentation transcript:

1 Controllable and Trustworthy Blockchain-based Cloud Data Management
Source: Future Generation Computer Systems, Vol. 91, pp , Feb Author: Lie-Huang Zhu, Yu-Lu Wu, Ke-Ke Gai, and Kim-Kwang Raymond Choo Speaker: Ren-Kai Yang Date: 2018/12/06 這篇論文是要在雲端資料管理用區塊鏈技術做到可控制和可信任的部份 可信任的部份大家對區塊鏈有一定的了解 就是分散式帳本 區塊鏈中資料是不可被竄改的 所以可信任的部份是沒問題的 但可控制的部份簡單來說是要做所謂的Access control那其實他會對整個架構上做一些調整

2 Outline Introduction Related Works Proposed Scheme Experiments
Security Analysis Conclusions and Comments

3 Introduction Problem: Invalidated Documents Changes Transparent
Unmodifiable 建築設計圖 偷工減料或因為利益沒有按照一開始的藍圖去建設(e.g. 台北大巨蛋) 有個中心(TA)把關修改的合法性 由政府單位來擔任

4 Related Works(1/2) Blockchain Network

5 Related Works(2/2) Smart Contract Ethereum 1. 2. 3. Contract’s Address

6 Proposed Scheme(1/3) Architecture

7 Proposed Scheme(2/3) Document Modification & Management 1. Request
2. SigSA(Request) SA U 4. Vote 3. SigU( ) Step 3. 隱私及效率 Smart Contract(Voting) TA 4. Vote Smart Contract(Counting)

8 Proposed Scheme(3/3) Voting and Counting Algorithm

9 Experiments(1/4) Setting Document Size User Amount Setting 1-1 10
[0, 50] Setting 1-2 20 Setting 1-3 50 Setting 1-4 100 Setting 2-1 [0, 100] Setting 2-2 Setting 2-3 Setting 2-4

10 Experiments(2/4)

11 Experiments(3/4)

12 Experiments(4/4)

13 Security Analysis Illegal Privacy Impersonation attack

14 Conclusions and Comments
Semi-centralization Comments Proof of Evidence