bcrypt vs Argon2: Right Password Hashing Algorithm
How bcrypt, scrypt, and Argon2 compare on memory hardness, GPU resistance, and which to choose for new projects in 2024.
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Tags: security, cryptography, hashing
bcrypt vs Argon2: The Best Password Hashing Algorithms Choosing a password hashing algorithm is one of the most consequential security decisions for any system that stores user credentials. The wrong choice — like using MD5 or SHA-256 — means that a database breach turns every user's password into plaintext within hours. The right choice means the same breach is practically useless to an attacker. Why Password Hashing Is Different From Generic Hashing Generic hash functions (SHA-256, SHA-512, BLAKE3) are designed to be fast. They're used for integrity checks, checksums, and digital signatures where speed is a feature. Password hashing requires the opposite property: deliberate slowness. The hash function must be computationally expensive to compute, so that an attacker who obtains the…
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