Blockchain Security Audit ｜Blockchain P2P Network Security Defense
The article aims to spread basic knowledge on blockchain security, Welcome to follow us and discuss
Author: Sharon
Last week Lunaray discussed the main attacks on blockchain P2P networks, and this time Lunaray will discuss how to defend against these attacks and ensure network security.
Lunaray has rich experience on blockchain security, and we hope that all these experience will help more people in this field.
(1)Strengthen DDoS defenses
Dealing with DDoS attacks is a systematic project, and it is unrealistic to rely solely on a system or product to defend against DDos.
At present, it is difficult to completely eliminate DDos attacks, but it is possible to resist 90% of DDoS attacks through appropriate measures, such as installing professional anti-DDos firewalls and deploying CDNs.
Since both attack and defense have costs, if the ability to defend against DDoS is enhanced through appropriate methods, then the attack cost of attackers is increased as well, and effective defense can be achieved.
(2)Strengthen the node access mechanism
Blockchain network users should be able to establish unique, verifiable digital identities through identities.
That means reasonably setting the number of connections, connection duration, address list size, update frequency, update mechanism, connection selection mechanism, anomaly detection mechanism, etc. of peer network nodes can strengthen the node access mechanism.
At the same time, those platforms providing blockchain services should have the basic mechanism of network boundary protection, network intrusion detection and virus defense.
(3)Strengthen the forwarding verification mechanism
The blockchain network should have a mechanism for detecting and spinning malicious nodes, which can detect malicious nodes in the network in a timely manner (such as nodes that launch denial of service attacks, nodes that do not do forwarding verification, nodes that forward incorrect routing information, etc.), and carry out targeted processing.
For example, for these nodes, policies such as restricting access and restricting forwarding can be adopted, and time limits can be set to prohibit the establishment of continuous communication connections.
For malicious transactions/blocks: Each node should have a reasonable transaction/block forwarding verification mechanism, and do not forward bad transactions/blocks.
As blockchain technology continues to evolve, blockchain security issues are also emerging. Lunaray not only focuses on blockchain security audit services, but also focuses on the study of various types of blockchain security issues and defense methods.
Stay tuned with Lunaray’s official media platforms and discuss blockchain security issues with us.
