Fundamentals of Blockchain Security Course

This course describes the blockchain and the cryptographic algorithms that it is built upon.

1 hour, 22 minutes

Course description

This course introduces the fundamentals of blockchain security. Early videos describe the foundational concepts of blockchain and how the components of the blockchain are put together to provide these properties. Later videos discuss the cryptography used in blockchain technology, describing how public-key cryptography and hash functions are used in blockchain and their security considerations.


Welcome to Blockchain Security!

Video - 00:03:00

Blockchain Security Hash Functions

Video - 00:05:00

This video discusses ways that hash functions can be attacked and the potential impact on blockchain.
Course Recap

Video - 00:01:00

This video reviews the information covered in this course and introduces the next one.
Hash Functions in Blockchain

Video - 00:18:00

This video introduces hash functions and describes how they are used in blockchain.
Blockchain Security: Public-Key Cryptography

Video - 00:13:00

This video discusses ways that public-key cryptography can be attacked and the potential impact on blockchain.
Public-Key Cryptography in Blockchain

Video - 00:11:00

This video introduces public-key cryptography and describes how it is used in blockchain.
Structure of the Blockchain

Video - 00:11:00

This video describes the "blocks" and "chains" that make up the blockchain.
Introduction to Blockchain

Video - 00:18:00

This video introduces the blockchain and discusses the promises of blockchain.
Course Introduction

Video - 00:03:00

This video introduces our blockchain security course, providing an overview of topics to be covered.

Meet the author

Howard Poston

Howard Poston is a copywriter, author, and course developer with experience in cybersecurity and blockchain security, cryptography, and malware analysis. He has an MS in Cyber Operations, a decade of experience in cybersecurity, and over five years of experience as a freelance consultant providing training and content creation for cyber and blockchain security. He is also the creator of over a dozen cybersecurity courses, has authored two books, and has spoken at numerous cybersecurity conferences. He can be reached by email at or via his website at

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