Welcome to CS120: Bitcoin for Developers I

Specific information about this course and its requirements can be found below. For more general information about taking Saylor Academy courses, including information about Community and Academic Codes of Conduct, please read the Student Handbook.

Course Description

Learn the components of Bitcoin and how they work together to keep Bitcoin's open, decentralized system running. This course will build the foundation you need to use and work with Bitcoin and other cryptocurrencies.

Course Introduction

How does Bitcoin work? Why is Bitcoin called a "cryptocurrency"? What cryptography does it use? How is security maintained in a system with no central authority? This course will answer these and many more questions. In this course, you will learn the building blocks that make up the open, decentralized system that is Bitcoin.

We'll start by diving into the cryptographic algorithms used in Bitcoin, and walk through how these tools are used to keep the system secure and running. This course is designed for students with a technical background, including some coding experience. Many of the examples and exercises will require some familiarity with coding to follow along.

When you finish this course, you'll be able to differentiate between public and private keys and understand how they are used in Bitcoin transactions, calculate the hash of a piece of data, and explain why hashing is used in Bitcoin's Proof-of-Work consensus protocol, list the functions of a wallet, describe the utility of nodes on the network, and more. You'll have the foundations necessary for understanding, working with, and building on Bitcoin and other open cryptocurrency systems.

This course includes the following units:

  • Unit 1: Introduction to Bitcoin Technology
  • Unit 2: Cryptographic Algorithms
  • Unit 3: Cryptographic Signatures
  • Unit 4: Hashing
  • Unit 5: Bitcoin Data
  • Unit 6: Bitcoin Nodes and Wallets
  • Unit 7: Transactions and Scripting
  • Unit 8: Reaching Consensus

Course Learning Outcomes

Upon successful completion of this course, you will be able to:

  • Differentiate between symmetric and asymmetric encryption and between public and private keys;
  • Convert data between encoding methods used in Bitcoin;
  • Determine the validity of a Bitcoin transaction by evaluating the transaction data and signature;
  • Differentiate between encryption algorithms used in Bitcoin and list their contribution to maintaining the system;
  • Identify components of the Bitcoin system, such as nodes and wallets, and list their functions; and
  • Summarize how the components of Bitcoin work together to keep Bitcoin's open, decentralized system running.

Throughout this course, you will also see learning outcomes in each unit. You can use those learning outcomes to help organize your studies and gauge your progress.

Course Materials

This course's primary learning materials are articles, lectures, and videos.

All course materials are free to access and can be found in each unit of the course. Pay close attention to the notes that accompany these course materials, as they will tell you what to focus on in each resource and will help you understand how the learning materials fit into the course as a whole. You can also see a list of all the learning materials in this course at this link.

Some parts of this course may have been created or reviewed with the support of artificial intelligence (AI). To make sure you receive accurate, high-quality, and academically sound learning materials, all AI-assisted content is carefully checked and approved by Saylor Academy's faculty and subject matter experts.

Evaluation and Minimum Passing Score

Only the final exam is considered when awarding you a grade for this course. To pass this course, you will need to earn a grade of 70% or higher on the final exam.

Your score on the exam will be calculated as soon as you complete it. Be sure to study in between each attempt! If you do not pass the exam, you will not complete this course or receive a certificate of completion. You can attempt the exam as many times as you want.

There are end-of-unit assessments in this course that are designed to help you study and do not factor into your final course grade. You can take them as many times as you want until you understand the concepts they cover.

You can see all of these assessments at this link.

Continuing Education Credits

The certificate earned by passing this self-paced course displays the program hours you completed and continuing education credits (CEUs). CEUs document successful completion of courses that are designed to improve the knowledge and skills of working adults. Many industries value CEUs, and now your certificate reflects them clearly, and they may be used to support career advancement or to meet professional licensing standards. This course contains 1.8 CEUs.

Tips for Success

CS120: Bitcoin for Developers I is a self-paced course, meaning you can decide when to start and complete the course. We estimate the "average" student will take hours to complete. We recommend studying at a comfortable pace and scheduling your study time in advance.

Learning new material can be challenging, so here are a few study strategies to help you succeed:

  • Take notes on terms, practices, and theories. This helps you understand each concept in context and provides a refresher for later study.
  • Test yourself on what you remember and how well you understand the concepts. Reflecting on what you've learned improves long-term memory retention.

Technical Requirements

This course is delivered entirely online. You will need access to a computer or web-capable mobile device and consistent internet access to view or download resources and complete auto-graded assessments and the final exam.

To access the full course, including assessments and the final exam, log into your Saylor Academy account and enroll in the course. If you don't have an account, you can create one for free here. Note that tracking progress and taking assessments require you to log in.

For more details and guidance, please review our complete Technical Requirements and our student Help Center.


Optional Saylor Academy Mobile App

You can access all course features directly from your mobile browser, but if you have limited internet connectivity, the Saylor Academy mobile app provides an option to download course content for offline use. The app is available for iOS and Android devices.

Fees

This course is entirely free to enroll in and access. All course materials, including textbooks, videos, webpages, and activities, are available at no charge. This course also contains a free final exam and a free course completion certificate.

Last modified: Friday, October 3, 2025, 1:35 PM