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How can I securely store user passwords in my web application?

Asked on Jan 10, 2026

Answer

To securely store user passwords in your web application, you should use a strong, one-way hashing algorithm with a unique salt for each password. This ensures that even if your database is compromised, the actual passwords remain protected.
<!-- BEGIN COPY / PASTE -->
    const bcrypt = require('bcrypt');
    const saltRounds = 10;

    function hashPassword(plainTextPassword) {
      return bcrypt.hash(plainTextPassword, saltRounds);
    }
    <!-- END COPY / PASTE -->
Additional Comment:
  • Always use a well-tested library like bcrypt, Argon2, or PBKDF2 for hashing passwords.
  • Never store plain text passwords or use reversible encryption for password storage.
  • Regularly update your hashing algorithm to the latest standards to ensure ongoing security.

✅ Answered with Security best practices.


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