论文标题
contra-*：针对区块链内存池的垃圾邮件攻击的机制
Contra-*: Mechanisms for Countering Spam Attacks on Blockchain's Memory Pools
论文作者
论文摘要
基于区块链的加密货币（例如比特币）已经看到其受欢迎程度和价值的上升，使它们成为了几种拒绝服务（DOS）攻击的目标，并呼吁从安全性和分布式系统的角度更好地了解其攻击表面。在本文中，为了了解区块链的攻击表面，我们探索了一种可以在内存池（MEMPOOLS）上进行的新形式的攻击形式，并主要针对基于区块链的加密货币。我们研究了对比特币Mempool的攻击，并探讨了对良性用户支付的交易费用的攻击效果。为了应对这一攻击，本文进一步提出了相反*：，使用费用，年龄和规模（因此，contra-f，contra-a和contra-s）作为优先级机制的一组对策。 contra-*：优化MEMPOOL尺寸，并有助于应对由于垃圾邮件交易而引起的DOS攻击的影响。我们通过模拟评估矛盾，并在各种攻击条件下分析它们的有效性。
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 mempool and explore the attack 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.
