Contra-∗: Mechanisms for countering spam attacks on blockchain's memory pools
- 주제(키워드) Blockchains , DDoS attacks , Memory pool
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 Academic Press
- 발행년도 2021
- 세부유형 Article
- URI http://www.dcollection.net/handler/ewha/000000181663
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.jnca.2020.102971
초록/요약
Blockchain-based cryptocurrencies, such as Bitcoin, have seen on the rise in their popularity and value, making them a target to several forms of Denial-of-Service (DoS) attacks, and calling for a better understanding of their attack surface from both security and distributed systems standpoints. In this paper, and in the pursuit of understanding the attack surface of blockchains, we explore a new form of attack that can be carried out on the memory pools (mempools), and mainly targets blockchain-based cryptocurrencies. We study this attack on Bitcoin's mempool and explore the attack's effects on transactions fee paid by benign users. To counter this attack, this paper further proposes Contra-∗, a set of countermeasures utilizing fee, age, and size (thus, Contra-F, Contra-A, and Contra-S) as prioritization mechanisms. Contra-∗ optimize the mempool size and help in countering the effects of DoS attacks due to spam transactions. We evaluate Contra-∗ by simulations and analyze their effectiveness under various attack conditions. © 2021 Elsevier Ltd
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