Controllable and Trustworthy Blockchainbased Cloud Data Management Source
Controllable and Trustworthy Blockchain-based Cloud Data Management Source: Future Generation Computer Systems, Vol. 91, pp. 527 -535, Feb. 2019. Author: Lie-Huang Zhu, Yu-Lu Wu, Ke-Ke Gai, and Kim-Kwang Raymond Choo Speaker: Ren-Kai Yang Date: 2018/12/06
Outline • Introduction • Related Works • Proposed Scheme • Experiments • Security Analysis • Conclusions and Comments 2
Introduction Problem: Invalidated Documents Changes ü Transparent ü Unmodifiable 3
Related Works(1/2) Ø Blockchain Network 4
Related Works(2/2) Ø Smart Contract 1. Ethereum 2. 3. Contract’s Address 5
Proposed Scheme(1/3) Ø Architecture 6
Proposed Scheme(2/3) Ø Document Modification & Management 1. Request U 2. Sig. SA(Request) SA 4. Vote 3. Sig. U( ) 4. Vote TA Smart Contract(Voting) Smart Contract(Counting) 7
Proposed Scheme(3/3) Ø Voting and Counting Algorithm 8
Experiments(1/4) Setting Document Size User Amount Setting 1 -1 10 [0, 50] Setting 1 -2 20 [0, 50] Setting 1 -3 50 [0, 50] Setting 1 -4 100 [0, 50] Setting 2 -1 10 [0, 100] Setting 2 -2 20 [0, 100] Setting 2 -3 50 [0, 100] Setting 2 -4 100 [0, 100] 9
Experiments(2/4) 10
Experiments(3/4) 11
Experiments(4/4) 12
Security Analysis • Illegal • Privacy • Impersonation attack 13
Conclusions and Comments ØConclusions • Semi-centralization ØComments • Proof of Evidence 14
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