Argon2id
Recommended Argon2id password hashing - hybrid approach for maximum security against all attacks
Short explanation
Argon2id is the recommended Argon2 variant for password hashing. It combines resistance to side-channel attacks and GPU cracking by using configurable memory, time, and parallelism costs.
Example input
correct-horse-battery-stapleTypical use
Use Argon2id to derive a password hash with a unique salt and cost settings tuned for your server budget.
When to use it
- Password storage for user accounts.
- Key derivation from passphrases where memory hardness is important.
- New systems that can choose a modern password hashing default.
When not to use it
- Fast checksums, file digests, or content identifiers.
- Client-side-only authentication flows without a careful threat model.
- Legacy systems that require bcrypt, scrypt, or PBKDF2 for compatibility.
FAQ
Is Argon2id better than bcrypt?
For new systems, Argon2id is usually preferred because it is memory-hard and tunable. bcrypt remains common for legacy compatibility.
Do I need a salt with Argon2id?
Yes. Use a unique random salt for each password so identical passwords do not produce identical hashes.
Should Argon2id be fast?
No. Password hashing should be intentionally expensive enough to slow offline guessing while staying acceptable for legitimate logins.
Recommended Argon2id password hashing - hybrid approach for maximum security against all attacks
Argon2i
Advanced Argon2i password hashing - protects against side-channel attacks with memory hardness
Argon2d
Memory-hard Argon2d password hashing - optimized for resistance to GPU cracking attacks
Scrypt
Memory-hard Scrypt password hashing - protects against hardware-based cracking attacks
PBKDF2
Standard PBKDF2 password hashing - NIST-approved key derivation for secure password storage