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

2. Outline Introduction Related Works Proposed Scheme Experiments
Security Analysis
Conclusions

3. Introduction Problem: 1. Invalidated Documents Changes
2. Illegal Operations

4. Related Works
Blockchain Network
Decentralization
Efficient
Security

5. Proposed Scheme(1/3)
Architecture

6. Proposed Scheme(2/3) Document Modification & Management 1. Request
2. SigSA(Request) SA
User
4. Vote
3. Hash( )
Smart Contract(Voting) TA
4. Vote
Smart Contract(Counting)

7. Proposed Scheme(3/3)
Voting and Counting Algorithm

8. Experiments(1/3) 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

9. Experiments(2/3)

10. Experiments(3/3)

11. Security Analysis
Illegal
Privacy
Impersonation attack

12. Conclusions
Semi-centralization