The Capability-Security Trade-Off of Blockchain for Data Sharing at the Network Edge

【Author】 Li, Yixin; Liang, Liang; Jia, Yunjian; Wen, Wanli; Chen, Zhengchuan

【Source】2022 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM 2022)

【影响因子】

【Abstract】Blokchain is a promising technology to enable distributed and reliable data sharing at the network edge. The high security in blockchain is undoubtedly a critical factor for the network to handle important data item. On the other hand, according to the trilemma in blockchain, an overemphasis on distributed security will lead to poor transaction-processing capability, which limits the application of blockchain in data sharing scenarios with high-throughput and low-latency requirements. To enable demand-oriented distributed services, this paper investigates the relationship between capability and security in blockchain from the perspective of block propagation and forking problem. First, a Markov chain is introduced to analyze the gossiping-based block propagation among edge servers, which aims to derive block propagation delay and forking probability. Then, we study the impact of forking on blockchain capability and security metrics, in terms of transaction throughput, confirmation delay, fault tolerance, and the probability of malicious modification. The analytical results show that with the adjustment of block generation rate, transaction throughput improves at the sacrifice of fault tolerance, and vice versa. Meanwhile, the decline in security can be offset by adjusting confirmation threshold, at the cost of increasing confirmation delay.

【Keywords】Blockchain; data sharing; performance analysis; Markov chain; trade-off

【发表时间】2022

【收录时间】2023-05-05

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