Hashing vs. encryption for passwords
Hashing and encryption are often confused. For passwords, hashing is the right approach because the server should not be able to recover the original password.
Why the terms often get confused
In everyday life, almost everything is described as encrypted. But there is an important difference with passwords: a password does not have to be made readable again.
The server only needs to check whether the input is correct. This is exactly what hashing is for.
The practical difference
- Encryption is reversible once the key is present.
- Hashing is for comparison and is not intended to restore the original.
- For passwords, a modern password hashing method with salt is the right direction.
Why this is crucial for data leaks
When a service stores passwords reversibly, leaks immediately become more dangerous. Attackers then have to invest less effort in the evaluation.
Even with hashing, a leak is still serious, but protection against direct disclosure is significantly better if the implementation is clean.
Quick checklist
The most important actions from this guide in compact form.
- If you develop your own passwords, never save them reversibly.
- When conducting security assessments, always ask about the hashing method used.
- As a user, avoid reuse because bad server practice can never be completely ruled out.
Common questions
Create a strong password now
Use the Zenkey.click generator to create a strong random password or a secure passphrase right away.