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Personalized Difficulty Adjustment for Countering the Double-Spending Attack in Proof-of-Work Consensus Protocols

arXiv:1807.02933
Date: 2018-07-09
Author(s): Chi-Ning Chou, Yu-Jing Lin, Ren Chen, Hsiu-Yao Chang, I-Ping Tu, Shih-wei Liao

Link to Paper


Abstract
Bitcoin is the first secure decentralized electronic currency system. However, it is known to be inefficient due to its proof-of-work (PoW) consensus algorithm and has the potential hazard of double spending. In this paper, we aim to reduce the probability of double spending by decreasing the probability of consecutive winning. We first formalize a PoW-based decentralized secure network model in order to present a quantitative analysis. Next, to resolve the risk of double spending, we propose the personalized difficulty adjustment (PDA) mechanism which modifies the difficulty of each participant such that those who win more blocks in the past few rounds have a smaller probability to win in the next round. To analyze the performance of the PDA mechanism, we observe that the system can be modeled by a high-order Markov chain. Finally, we show that PDA effectively decreases the probability of consecutive winning and results in a more trustworthy PoW-based system.

References
[1] Satoshi Nakamoto, “Bitcoin: A peer-to-peer electronic cash system,” Consulted, vol. 1, no. 2012.
[2] Ephraim Feig, “A framework for blockchain-based applications,” arXiv preprint arXiv:1803.00892, 2018.
[3] Marta Piekarska Harry Halpin, “Introduction to security and privacy on the blockchain,” in Symposium on Security and Privacy Workshops, 2017 IEEE European Symposium on. IEEE, 2017.
[4] Ayelet Sapirshtein, Yonatan Sompolinsky, and Aviv Zohar, “Optimal selfish mining strategies in bitcoin,” in Financial Cryptography and Data Security. 2017, pp. 515–532, Springer.
[5] Ghassan Karame, Elli Androulaki, and Srdjan Capkun, “Two bitcoins at the price of one? double-spending attacks on fast payments in bitcoin.,” IACR Cryptology ePrint Archive, vol. 2012.
[6] Ghassan O Karame, Elli Androulaki, Marc Roeschlin, Arthur Gervais, and Srdjan Capkun, “Misbehavior in bitcoin: A study ˇ of double-spending and accountability,” ACM Transactions on Information and System Security (TISSEC), vol. 18, no. 1.
[7] Tobias Bamert, Christian Decker, Lennart Elsen, Roger Wattenhofer, and Samuel Welten, “Have a snack, pay with bitcoins,” in Peer-to-Peer Computing (P2P), 2013 IEEE Thirteenth International Conference on. IEEE, 2013, pp. 1–5.
[8] Chrysoula Stathakopoulou, “A faster bitcoin network,” 2015.
[9] Adrian E Raftery, “A model for high-order markov chains,” Journal of the Royal Statistical Society. Series B (Methodological), pp. 528–539, 1985.
[10] Andre Berchtold and Adrian E Raftery, “The mixture tran- ´sition distribution model for high-order markov chains and non-gaussian time series,” Statistical Science, pp. 328–356, 2002.
[11] Waiki Ching, Michael K Ng, and Shuqin Zhang, “On computation with higher-order markov chains,” in Current Trends in High Performance Computing and Its Applications, pp. 15–24. Springer, 2005.
[12] Michael K Ng and WK Ching, Markov Chains: Models, Algorithms and Applications, Springer, 2006.
[13] Wen Li and Michael K Ng, “On the limiting probability distribution of a transition probability tensor,” Linear and Multilinear Algebra, vol. 62, no. 3.
[14] Jen-Hung Tseng, Yen-Chih Liao, Bin Chong, and Shih-Wei Liao, “Governance on the drug supply chain via gcoin blockchain,” International Journal of Environmental Research and Public Health, 2018.
[15] Shih-Wei Liao, Boyu Lin, and En-Ran Zhou, “Gcoin:wiki, code and whitepaper,” https://g-coin.org and github.com/OpenNetworking/gcoin-community/wiki/Gcoinwhite-paper-English, 2014.
[16] Meni Rosenfeld, “Analysis of hashrate-based double spending,” arXiv preprint arXiv:1402.2009, 2014.
[17] Joshua A Kroll, Ian C Davey, and Edward W Felten, “The economics of bitcoin mining, or bitcoin in the presence of adversaries,” in Proceedings of WEIS, 2013, vol. 2013.
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