Fundamentals of Blockchain Security

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

7 videos  //  66 minutes of training

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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.

Course syllabus

Course IntroductionDuration: 2:32

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

Introduction to BlockchainDuration: 17:42

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

Structure of the BlockchainDuration: 10:34

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

Public-Key Cryptography in BlockchainDuration: 10:45

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

Blockchain Security: Public-Key CryptographyDuration: 4:51

This video discusses ways that public-key cryptography can be attacked and the potential impact on blockchain.

Hash Functions in BlockchainDuration: 18:16

This video introduces hash functions and describes how they are used in blockchain.

Course RecapDuration: 0:58

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

Meet the author

Howard Poston


Howard Poston is a cybersecurity researcher with a background in blockchain, cryptography and malware analysis. He has a master's degree in Cyber Operations from the Air Force Institute of Technology and two years of experience in cybersecurity research and development at Sandia National Labs. He currently works as a freelance consultant providing training and content creation for cyber and blockchain security. He can be reached by email at [email protected] or via his website at

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