Module 5: Blockchain Security

Learn blockchain security best practices, smart contract auditing, and vulnerability prevention techniques.

Back to Course|3.5 hours|Beginner

Blockchain Security

Learn blockchain security best practices, smart contract auditing, and vulnerability prevention techniques.

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Select Topics Overview

Smart Contract Security

Understand common smart contract vulnerabilities, security best practices, and how to write secure smart contracts.

Content by: Sahil Parmar

Blockchain Developer

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Common Vulnerabilities

  • •Reentrancy: Multiple function calls before completion
  • •Integer Overflow/Underflow: Mathematical operation errors
  • •Access Control: Unauthorized function execution
  • •Front-running: Transaction ordering manipulation
  • •Denial of Service: Blocking contract functionality

Security Best Practices

  • •Use established libraries like OpenZeppelin
  • •Implement proper access controls
  • •Test thoroughly with multiple scenarios
  • •Keep contracts simple and auditable
  • •Plan for upgradeability and emergency stops

🎯 Practice Exercise

Test your understanding of this topic:

Next Module

Module 6: Advanced Blockchain Topics

Additional Resources

📚 Recommended Reading

  • •Smart Contract Security Best Practices
  • •Blockchain Auditing Guide
  • •Security Testing Strategies
  • •Vulnerability Prevention Guide

🌐 Online Resources

  • •OpenZeppelin contracts library
  • •Consensys Diligence tools
  • •Security testing frameworks
  • •Audit report examples

Ready for the Next Module?

Continue your learning journey and master the next set of concepts.

Continue to Module 6