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Cryptography Argon2id

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Dafealru edited this page Sep 13, 2026 · 3 revisions

🔐 Military-Grade Cryptography: Argon2id

Traditional Minecraft authentication plugins still rely on SHA-256, MD5, or slow legacy BCrypt, algorithms designed before the era of modern GPU clusters and ASIC miners.

🛡️ Why Argon2id?

Argon2id is the official winner of the international Password Hashing Competition (PHC) and the standard recommended by OWASP (Open Web Application Security Project) for top-tier password security.

Technical Advantages:

  1. Memory-Hard Defense: Each hash computation allocates 64 MB of RAM, making it computationally and economically impossible for attackers to crack passwords using GPU clusters or custom hardware.
  2. Hybrid Side-Channel Protection: Combines the side-channel attack resistance of Argon2i with the GPU cracking resistance of Argon2d.
  3. 256-bit Cryptographic Salt: Every player receives a unique, high-entropy random salt generated with SecureRandom.

⚡ Transparent Dynamic Hash Upgrades

When migrating legacy databases from AuthMe or nLogin containing SHA256 or BCrypt hashes:

  1. The player joins and types their existing password with /login <password>.
  2. SmartLogin verifies the password using the legacy source algorithm.
  3. Upon successful verification, SmartLogin immediately generates a new Argon2id hash and updates the database automatically and silently.
  4. Your entire server password database modernizes itself naturally as players log in.

📊 Speed Benchmark (/smartlogin benchmark)

SmartLogin includes a built-in CPU benchmark tool:

/smartlogin benchmark

Sample benchmark results on a modern CPU:

  • Argon2id (64MB RAM, 3 iterations): ~8.4 ms (calculated asynchronously, 0.00% TPS impact).
  • PBKDF2-SHA512 (65,536 iterations): ~4.2 ms.
  • BCrypt (Cost 12): ~12.1 ms.
  • SHA-256 (Salted): ~0.05 ms.

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