Book Image

Hands-On Cybersecurity with Blockchain

By : Rajneesh Gupta
Book Image

Hands-On Cybersecurity with Blockchain

By: Rajneesh Gupta

Overview of this book

Blockchain technology is being welcomed as one of the most revolutionary and impactful innovations of today. Blockchain technology was first identified in the world’s most popular digital currency, Bitcoin, but has now changed the outlook of several organizations and empowered them to use it even for storage and transfer of value. This book will start by introducing you to the common cyberthreat landscape and common attacks such as malware, phishing, insider threats, and DDoS. The next set of chapters will help you to understand the workings of Blockchain technology, Ethereum and Hyperledger architecture and how they fit into the cybersecurity ecosystem. These chapters will also help you to write your first distributed application on Ethereum Blockchain and the Hyperledger Fabric framework. Later, you will learn about the security triad and its adaptation with Blockchain. The last set of chapters will take you through the core concepts of cybersecurity, such as DDoS protection, PKI-based identity, 2FA, and DNS security. You will learn how Blockchain plays a crucial role in transforming cybersecurity solutions. Toward the end of the book, you will also encounter some real-world deployment examples of Blockchain in security cases, and also understand the short-term challenges and future of cybersecurity with Blockchain.
Table of Contents (17 chapters)
Title Page
About Packt
Contributors
Preface
Index

Challenges with current DNS 


Today, DNS has become the backbone of the internet and organization's networks. The DNS is mission-critical infrastructure that no organization can function without. However, despite growing investment in network and information security, attackers still manage to invade the network, and the DNS remains a vulnerable component in the network infrastructure that is often used as an attack vector. Firewalls leave port 53 open and never look inside each query. Let's look at one of the most widely used DNS-based attacks:

DNS spoofing 

When a DNS server's records are altered to redirect the traffic to the attacker's server, the DNS gets hijacked. This redirection of traffic allows the attacker to spread malware across the network. DNS spoofing can be carried out in one of the following three ways:

  • DNS cache poisoning: An attacker can take advantage of cached DNS records and can then perform spoofing by injecting a forged DNS entry into the DNS server. As a result, all...