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CS120 Study Guide

Course Introduction

Course Syllabus

Unit 1: Introduction to Bitcoin Technology

1.1: What is Bitcoin?

What is Bitcoin?

Bitcoin: A Peer-to-Peer Electronic Cash System

1.2: P2P Networks

The Bitcoin Network

1.3: Ledger Entries

Bitcoin Transactions

1.4: Intro to Consensus

Understanding Consensus

1.5: Decentralization and Balance of Power

Consensus Algorithms, Blockchain Technology, and Bitcoin

1.6: Open Systems

Why Open Blockchains Matter

1.7: Exercise: Look Up a Transaction on a Blockchain Explorer

Exercise: Look Up a Transaction on a Blockchain Explorer

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 1

Unit 1 Assessment

Unit 1 Assessment

Unit 2: Cryptographic Algorithms

2.1: What is Cryptography?

What is Cryptography?

2.2: Cryptographic Keys

Keys and Addresses

2.3: The Basics of Hashing

Cryptographic Hash Functions

2.4: Keys and Transaction Signatures

Digital Signatures

2.5: Keys and Bitcoin Addresses

Keys and Bitcoin Addresses

Can Someone Guess My Crypto Private Key?

2.6: Exercise: Encrypt and Decrypt Data

Exercise: Encrypt and Decrypt Data

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 2

Unit 2 Assessment

Unit 2 Assessment

Unit 3: Signatures and Transactions

3.1: What is a Digital Signature?

What are Cryptographic Primitives?

3.2: Exercise: Sign and Validate Data

Exercise: Sign and Validate Data

3.3: Introduction to Bitcoin Transactions

More on Bitcoin Transactions

3.4: How Bitcoin Transactions Use Signatures

Elliptic Curve Signatures

Locking Scripts and Transaction Verification

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 3

Unit 3 Assessment

Unit 3 Assessment

Unit 4: Hashing and Mining

4.1: What is a Hash?

Hash Functions, Mining, and Addresses

4.2: Hashing Algorithms

Hashing Algorithms

4.3: Exercise: Hash Something

Exercise: Hash Something

4.4: Hashing and Bitcoin Mining

Mining and Consensus

Mining Fees, Block Data, Block Headers, and Proof-of-Work

How Is the Number of Zeros in the Target Hash Determined?

4.5: Exercise: Try a Mining Simulator

Exercise: Try a Mining Simulator

4.6: Merkle Trees

Merkle Trees

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 4

Unit 4 Assessment

Unit 4 Assessment

Unit 5: Bitcoin Data

5.1: How Bitcoin Transmits Data on the Network

More on the Bitcoin Network

SVP Nodes

5.2: Bitcoin Addresses and Keys

Base58

Data Encoding

5.3: Hex Encoding

Hex

5.4: How Bitcoin Stores Data in the Block Structure

The Blockchain

5.5: Exercise: View Block Data

Exercise: View Block Data

5.6: Exercise: Convert Data between Decimal, Base58, and Hex

Exercise: Convert Data between Decimal, Base58, and Hex

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 5

Unit 5 Assessment

Unit 5 Assessment

Unit 6: Bitcoin Nodes and Wallets

6.1: What a Node Does

What is the Role of Nodes?

6.2: Who Runs a Node and Why?

Running Your Own Node

6.3: Exercise: Set Up a Regtest Node

Exercise: Set Up a Regtest Node

6.4: The Functions of a Bitcoin Wallet

Wallets

6.5: Exercise: View Your Node Wallet Data

Exercise: View Your Node Wallet Data

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 6

Unit 6 Assessment

Unit 6 Assessment

Unit 7: Transactions and Scripting

7.1: What's in a Transaction?

What's in a Transaction?

7.2: The Transaction Timeline

The Lifecycle of a Transaction

7.3: Transaction Scripting

Scripts and Script Language

Advanced Transactions and Scripting

Complex Scripts

Transactions and Multisig

7.4: Exercise: Bitcoin Scripting

Exercise: Bitcoin Scripting

Study Session Review Video

CS120: Bitcoin for Developers I | Study Session Unit 7

Unit 7 Assessment

Unit 7 Assessment

Unit 8: Reaching Consensus

8.1: Elements of Valid Transactions

Honest Nodes and Consensus

8.2: The Mining Process

The Mining Process

8.3: Consensus

Validating Blocks

The Consensus Process

Consensus Attacks

8.4: Updating Consensus

Updating Consensus

8.5: Exercise: Create a Valid Transaction via Your Testnet Node

Exercise: Create a Valid Transaction via Your Testnet Node

Study Session Video Review

CS120: Bitcoin for Developers I | Study Session Unit 8

Unit 8 Assessment

Unit 8 Assessment

Study Guide

CS120 Study Guide

Course Feedback Survey

Course Feedback Survey

Certificate Final Exam

CS120: Certificate Final Exam
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Arts & Humanities

Art History

Communication

English

Philosophy

Business Administration

Computer Science

English as a Second Language

Professional Development

Business and Communication

College Success

Computer and Information Technology

General Knowledge for Teachers

Writing and Soft Skills

Science and Math

Biology

Chemistry

Mathematics

Physics

Social Science

Economics

Geography

History

Political Science

Psychology

Sociology

Catalyst Test

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Table of contents

Navigating this Study Guide
Unit 1: Introduction to Bitcoin Technology
- Study Session Unit 1
Unit 2: Cryptographic Algorithms
- Study Session Unit 2
Unit 3: Cryptographic Signatures
- Study Session Unit 3
Unit 4: Hashing
- Study Session Unit 4
Unit 5: Bitcoin Data
- Study Session Unit 5
Unit 6: Bitcoin Nodes and Wallets
- Study Session Unit 6
Unit 7: Transactions and Scripting
- Study Session Unit 7
Unit 8: Reaching Consensus
- Study Session Unit 8

CS120: Bitcoin for Developers I
Study Guide
CS120 Study Guide

CS120 Study Guide

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Completion requirements

Unit 6: Bitcoin Nodes and Wallets

Study Session Unit 6

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Saylor Academy © 2010-2025 except as otherwise noted. Excluding course final exams, content authored by Saylor Academy is available under a Creative Commons Attribution 3.0 Unported license. Third-party materials are the copyright of their respective owners and shared under various licenses. See detailed licensing information. Saylor Academy®, Saylor.org®, and Harnessing Technology to Make Education Free® are trade names of the Constitution Foundation, a 501(c)(3) organization through which our educational activities are conducted.