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Security
January 20, 20258 min read

Password Security in 2025: Best Practices

The rules of password security have changed. With the rise of specialized cracking hardware and quantum computing on the horizon, developers must adapt. Here is how to stay ahead in 2025.

Entropy Over Complexity

For decades, we told users to use special characters and numbers (e.g., Tr0ub4dor&3). We now know this was a mistake. Humans are predictable, and these complexity requirements lead to passwords that are easy for computers to guess but hard for humans to remember.

In 2025, the focus has shifted to Entropy (randomness) and Length. A 20-character passphrase made of common words like sunset-coffee-bridge-runner is significantly more secure than an 8-character complex password.

The Developer's Responsibility: Storage

If your database is compromised, the only thing standing between a hacker and your users' accounts is your hashing algorithm.

  • Never use MD5 or SHA-1: These are broken and can be cracked in seconds.
  • Move beyond SHA-256: While not "broken," SHA-256 is too fast. A hacker can try billions of hashes per second.
  • Use Argon2id: Currently the winner of the Password Hashing Competition, Argon2id is resistant to GPU and ASIC-based attacks.
  • Bcrypt is still okay: If you can't use Argon2, bcrypt remains a solid, time-tested second choice.

Implementing NIST Guidelines

The National Institute of Standards and Technology (NIST) has released updated recommendations that every developer should follow:

  1. No Arbitrary Rotation: Stop forcing users to change passwords every 90 days. It only encourages them to use weak variations of their old password. Only require changes if there is evidence of a breach.
  2. Allow Paste: Never block users from pasting into password fields. This discourages the use of password managers.
  3. Max Length: Set a generous maximum length (at least 64-128 characters) to accommodate password managers and long passphrases.

The Rise of Passkeys

The best password is no password at all. Passkeys (built on the WebAuthn standard) allow users to sign in using biometrics or hardware keys. They are phishing-resistant and should be the primary authentication method for any security-conscious application in 2025.

Conclusion

Password security is a moving target. By prioritizing length, using memory-hard hashing algorithms like Argon2, and embracing Passkeys, you provide your users with the best defense available.

Need to generate a strong password? Use our Secure Password Generator.

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