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Q & A Developer · September 11, 2026

What hash function should I use for passwords?

Argon2id (recommended) or bcrypt. Never MD5, SHA-1, SHA-256, or SHA-512 alone — they’re fast by design, meaning attackers can brute-force billions of guesses per second on GPUs. Argon2id parameters for 2026: memory=64MB, time=3, parallelism=4. bcrypt parameters: work factor 12. Both slow down each guess to ~250ms, making brute-force attacks impractical. Salt is included automatically in both. Generate both with the hash generator. If your framework supports Argon2id natively, use it; otherwise bcrypt is a fine second choice.

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What Is a JWT?
JWT (JSON Web Token) is the dominant format for API authentication, OAuth access tokens, and stateless session management. Three base64-encoded segments carry the header, claims, and signature — anyone can read them, but only the key holder can produce a valid token.
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