DoS Attacks and Defense Technologies in Blockchain Systems: A Hierarchical Analysis

TL;DR

This paper categorizes and analyzes DoS attacks on blockchain systems, focusing on attack methods and defense strategies across different architectural layers to enhance security and stability.

Contribution

It provides a hierarchical analysis of DoS attacks in blockchain, explaining attack principles and comparing defense techniques to improve security measures.

Findings

Categorized DoS attacks by blockchain architecture layers

Analyzed and compared detection and defense methods

Highlighted areas for improving blockchain security

Abstract

Blockchain technology is widely used in various fields due to its ability to provide decentralization and trustless security. This is a fundamental understanding held by many advocates, but it is misunderstood, leading participants to fail to recognize the limitations of the security that blockchain can provide. Among all current network attacks, Denial of Service (DoS) attacks pose significant threats due to their ease of execution and destructive potential. This paper, based on the blockchain architecture hierarchy, categorizes and organizes existing DoS attacks, with a focus on explaining the principles and methods of contract layer and consensus layer DoS attacks. Furthermore, this paper comprehensively analyzes and compares commonly used detection methods and defense technologies, which will contribute to strengthening the security and stability of blockchain systems and promoting further innovation and application of blockchain systems.