How Databases Store Passwords Securely

Password security in databases relies on multiple layers of protection. Hash functions convert passwords into irreversible fingerprints, but hackers can use rainbow tables to crack common passwords. Adding unique salts prevents rainbow table attacks by making identical passwords produce different hashes. Adaptive algorithms like bcrypt, scrypt, and Argon2 slow down brute force attacks by making password hashing computationally expensive. Some companies add peppers (secret values stored separately) for extra protection. Major companies follow OWASP guidelines and are moving toward passwordless authentication using passkeys, which eliminate the need to store password data entirely.