Solidity Developer

Quiz 4

Questions: 7

Web3 Wallet Security Web3 Wallet Security Basics
1. Web3 Wallets Intro
A foundational introduction to Wallet Basics: Securely Interacting with the Blockchain - Grasp how cryptocurrency wallets function as your gateway to the blockchain, exploring the key differences between browser, hardware, and custodial types. Discover why meticulous transaction verification before signing is paramount for security, empowering you to manage assets and make informed choices confidently. Duration: 4min
2. Learning Best Practices
A strategic companion to Maximizing Your Learning: Course Best Practices - Navigate this course effectively by leveraging Cyfrin Updraft's features, GitHub resources, and community support. Master essential learning techniques such as active coding, thoughtful AI engagement, and personalized pacing for ultimate success. Duration: 8min
3. Best Wallets for Beginners
A straightforward introduction to Choosing Your First Crypto Wallet: A Guide for Absolute Beginners - Navigate your first Web3 steps with wallet advice for absolute beginners, highlighting custodial solutions as a starting point. Uncover the pros, cons, and why learning self-custody is key for ultimate crypto ownership and security. Duration: 5min
4. Quiz Quiz
Questions: 7
5. Browser and Hardware Wallets
A comprehensive guide to Navigating Web3 Wallets: Browser and Hardware Options for Everyday Use - Compare browser wallets (e.g., MetaMask) for daily "small monies" with secure hardware wallets (e.g., Trezor) for varied Web3 needs. Understand risk assessment, essential security practices, and tools to protect your assets when interacting with dApps and managing crypto. Duration: 6min
6. Multi Signature Wallets (Multi Sig)
An indispensable overview to Mastering Crypto Security: An In-Depth Guide to Multi-Signature Wallets - Delve into multi-sig wallets, smart contracts demanding multiple private keys (X-of-Y) for transaction approval, drastically enhancing on-chain security. Discover their operational mechanics, the power of eliminating single failure points, and why they're essential for developers, DAOs, and asset protection. Duration: 3min
7. Quiz 2 Quiz
Questions: 9
8. Social Recovery Wallets
An insightful walkthrough to Understanding Social Recovery Wallets: An Advanced Storage Option - Learn how these advanced wallets blend a user-friendly signing key with "guardian"-assisted recovery, secured by Shamir's Secret Sharing, to protect your assets. Compare their function to multi-sigs and understand key benefits like overcoming single points of failure. Duration: 3min
9. Gnosis Safe Wallets
An illuminating breakdown of Understanding Safe: The Premier Programmable Smart Contract Wallet - Delve into Safe (formerly Gnosis Safe), the premier programmable smart contract wallet, highlighting its robust security advantages over traditional EOAs like multisig and key rotation. Understand its open-source core architecture, developer integrations, and why it's the trusted standard for asset protection. Duration: 3min
10. Disaster Recovery
A vital guide to Key Security - Learn to securely set up Metamask, understanding the critical role of your seed phrase and private keys for asset protection. Practice disaster recovery drills to ensure you can always regain access to your funds if the unexpected happens. Duration: 7min
11. Quiz 3 Quiz
Questions: 8
12. Introduction Transactions Verification
An Introduction to Transaction Verification - Walk through a real Aave ETH supply transaction to master MetaMask verification, from checking the DApp's URL and smart contract address to dissecting function calls and data parameters. Learn to cross-reference with official documentation and Etherscan to ensure every Web3 interaction is safe and intended. Duration: 12min
13. Introduction to Signatures Verification
A practical lesson in Understanding and Verifying Web3 Signatures: A Practical Guide - Master the skill of scrutinizing Web3 signature requests, learning to detect domain spoofing and other phishing tactics. Use the wise-signer.cyfrin.io platform to practice identifying these threats and protect your assets from malicious actors. Duration: 2min
14. Quiz 4 Quiz
Questions: 7
15. Dont Trust the Website
A vital demonstration to The Golden Rule of Web3 Transactions: Trust Your Wallet, Not the Website - Learn why your hardware wallet's trusted display is the ultimate arbiter of truth, not deceptive website interfaces, when approving Web3 actions. See a real-world simulation where meticulously verifying details on-device averts a significant error and protects your assets. Duration: 3min
16. Best Web3 Hardware Wallets
A vital continuation of Beyond the Wise Signer Challenge: Mastering Transaction Security - Elevate your transaction scrutiny by understanding why your wallet display is the ultimate authority, not DApp interfaces, and grasp the security tiers from browser to hardware and multi-sig wallets. Learn the power of decoding call data to gain full clarity before approving any on-chain action. Duration: 2min

Course Overview

About the course

What you'll learn

The importance of transaction verification

How to identify security threats

Basic web3 wallet security practices

To create a disaster recovery plan

Differences between web3 wallets types

Course Description

Who is this course for?

  • Blockchain users
  • Finance Professionals
  • Software engineers
  • Web3 developers

Meet your instructors

Patrick Collins

Patrick Collins

Founder at Cyfrin

Web3 engineer, educator, and Cyfrin co-founder. Patrick's smart contract development and security courses have helped hundreds of thousands of engineers kickstarting their careers into web3.

Last updated on June 11, 2025