Blockchains have been called one of the next big revolutions in computing. In this course, Blockchain - Principles and Practices, you’ll learn to understand how a blockchain works and how they apply in the real-world. First, you’ll explore the cryptography principles required for a blockchain. Next, you’ll discover how transactions are stored within a block. Then, you will learn how proof of work makes a blockchain resistant to tampering and corruption. Finally, you’ll learn how consensus is maintained over a network to keep a blockchain secure and reliable. When you’re finished with this course, you’ll have the skills and knowledge of blockchains needed to understand how they work and can be applied to your systems.