A Strategy for Mitigating Denial of Service Attacks on Nodes with Delegate Account of Lisk Blockchain

Abstract

In this paper, I evaluate a type of denial of service attack, bandwidth depletion, that difficult the block propagation in blockchain networks. Towards the end, I study the attack on Lisk blockchain and explore its effects in the Delegated Proof of Stake consensus. I also propose a methodology joint with two tools I've created as countermeasures against such type of attack. The methodology is composed of the configuration of the same delegate account in more than one node joint with the use of created tools capable to detect the percentage of consensus on each monitored node and activate block forging status in a single node dynamically. Therefore, allowing a block to be forged even when the delegate account is under attack on another node and reducing the chance of forks creation on the blockchain with the same delegate account configured and activated on two or more nodes in the same forging time slot.