Argon2

Argon2 is a modern, memory-hard cryptographic hash function designed for password hashing and key derivation. It won the Password Hashing Competition in 2015 and is recommended for secure password storage due to its resistance to GPU and ASIC attacks. It offers configurable parameters for memory usage, parallelism, and time cost to adapt to different security requirements.

Also known as: Argon2i, Argon2d, Argon2id, Argon2 hash, Argon2 algorithm

Why learn Argon2?

Developers should use Argon2 when implementing secure password storage in applications, as it provides strong protection against brute-force and side-channel attacks. It is particularly valuable in web applications, authentication systems, and any scenario where user credentials need long-term protection, such as in databases or authentication servers.

Learning Resources

• docs: Argon2 Official Documentation
• docs: OWASP Password Storage Cheat Sheet
• tutorial: Argon2 Tutorial on Auth0 Blog
• course: Crypto 101 - Password Hashing