Mastering Cryptography Fundamentals with Node's crypto module
summary
Node.js's built-in crypto module is shown end to end: getCiphers lists 171 algorithms and the demo uses AES-256-CBC with random IV and buffer-based encrypt/update/final for correct streams. Passwords become keys via scrypt KDF with salt (also mentions pbkdf2, hkdf). Randomness uses randomBytes/randomFill/randomInt/randomUUID. Key exchange covers createDiffieHellman (20s) and ECDH, and asymmetric crypto shows generateKeyPair + publicEncrypt/privateDecrypt, plus crypto.sign/verify and x509 certificate chain validation.
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chapters (14)
- 0:00🚀 Introduction: The Basics of Cryptography and Its Importance
- 3:00What is Cryptography?
- 6:00Introduction to the Node.js crypto module
- 8:00Understanding Symmetric Encryption and AES 256
- 11:30Implementing AES Encryption and Decryption in Node.js
- 14:30Introduction to Key Derivation Functions (KDFs)
- 18:00Practical Example of KDFs Using Node.js
- 20:30Generating Random Values in Cryptography
- 23:00Understanding Asymmetric Encryption and RSA
- 26:30How RSA Encryption Solves the Key Distribution Problem
- 30:00Signing and Verifying Messages
- 32:12Using Digital Certificates and Certificate Authorities
- 34:00Real-World Applications of Cryptography (e.g., Vaccination QR Codes)
- 35:10Conclusion: How Cryptography Helps Secure the Modern Web
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