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Contra-∗: Mechanisms for countering spam attacks on blockchain's memory pools
- Title
- Contra-∗: Mechanisms for countering spam attacks on blockchain's memory pools
- Authors
- Saad M.; Kim J.; Nyang D.; Mohaisen D.
- Ewha Authors
- 양대헌
- SCOPUS Author ID
- 양대헌
- Issue Date
- 2021
- Journal Title
- Journal of Network and Computer Applications
- ISSN
- 1084-8045
- Citation
- Journal of Network and Computer Applications vol. 179
- Keywords
- Blockchains; DDoS attacks; Memory pool
- Publisher
- Academic Press
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- 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
- DOI
- 10.1016/j.jnca.2020.102971
- Appears in Collections:
- 인공지능대학 > 사이버보안학과 > Journal papers
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