Just take the string as bytes and hash it ffs
this post was submitted on 26 Aug 2024
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Mildly Infuriating
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Because then that means you don't salt your hashes, or that you distribute your salt to the browser for the hash. That's bad.
You could salt it. Distributing a unique salt doesn't help attackers much. Salt is for preventing precomputing attacks against a whole database. Attacking one password hash when you know the salt is still infeasible.
It's one of those things in security where there's no particular reason to give your attacker information, but if you've otherwise done your job, it won't be a big deal if they do.
You don't hash in the browser because it doesn't help anything.
It helps against the server being able to read the password, so a bad actor (either the website itself or after a hack) could read your password. Which isn't bad if you're using good password hygiene with random passwords, but that sadly is not the norm.
It doesn't. It just means the attacker can send the hash instead of the password.
For that particular website yes, but a salted client side hash is worthless on a different website.
Edit: plus even unsalted it would only work if the algorithm is the same and less iterations are done
If the end user is reusing passwords. Which, granted, a lot of people do.
On the flip side, we're also forcing the use of JavaScript on the client just to handle passwords. Meanwhile, the attack we're protecting against only works for reused passwords, and the attacker is inside the server and can see the password after transport layer encryption is removed. This is a pretty marginal reason to force the complexity of JavaScript.