How password salting ensures unique hashes for identical passwords

Short summary

This article explains how password salting ensures identical passwords produce different hashes by adding unique random data before hashing. It walks through the five steps of salting—salt generation, combination, hashing, storage, and verification—with a Node.js crypto module example using scrypt. The author recommends production libraries like bcrypt or argon2 over hand-rolled implementations.

• •Salting adds unique random data per user before hashing, making identical passwords produce different hashes
• •Node.js example uses crypto.scryptSync with CSPRNG-generated 16-byte salts
• •Production apps should use dedicated bcrypt or argon2 libraries instead of hand-rolled crypto

Generated with AI, which can make mistakes.