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# Introduction to Blockchain Technology

Do you want to refresh your blockchain knowledge? This module deals with the in and outs of blockchain technology.

This module is meant as an introduction to blockchain technology in general. If you feel your blockchain knowledge does not need an introduction, you can dive directly into the content for Week 1.

About this chapter

In this first chapter, you will:

  • Understand what a blockchain is.
  • Learn how blockchain relates to the double-spending problem.
  • Recap the historic development of blockchain technology.
  • Dive into the cryptographic fundamentals that make blockchain possible.
  • Discover the differentiating characteristics of public and managed chains.
  • Revisit how consensus is established in distributed networks.

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