Password Hashing Fundamentals: Argon2 and scrypt

Storing user passwords securely is one of the most critical responsibilities of any developer or system administrator. Standard encryption and outdated hashing methods are no longer sufficient to withstand modern, high-powered brute-force attacks. This text-based course guides you through the core principles of cryptographic hashing, helping you understand how to implement the industry's strongest password hashing algorithms, Argon2 and scrypt, to safeguard user credentials. What you'll learn: - Understand the fundamental differences between encryption, encoding, and cryptographic hashing. - Analyze why older algorithms like MD5, SHA-1, and bcrypt are being succeeded by modern memory-hard alternatives. - Configure scrypt parameters to balance security and system resource usage effectively. - Implement Argon2, the industry-standard algorithm, using its different variants like Argon2id. - Apply modern security best practices, including salting, pepper usage, and defending against GPU-based cracking hardware. - Plan a secure migration strategy to upgrade legacy password hashes in an active database without disrupting users. You will start with key terminology and foundational concepts of cryptography before moving into the technical mechanics of memory-hard functions. Through clear written explanations and practical code snippets, you will learn how to select, configure, and integrate modern hashing algorithms into your authentication workflows. This course is designed for beginner developers, system administrators, and security enthusiasts who want to build a solid foundation in credential storage. No prior cryptography experience is required. Start reading today to build robust, secure authentication systems that keep user data safe.