Why would you salt the password hash?
A cryptographic salt is made up of random bits added to each password instance before its hashing. Salts create unique passwords even in the instance of two users choosing the same passwords. Salts help us mitigate hash table attacks by forcing attackers to re-compute them using the salts for each user.
Is hash of salted password still vulnerable?
Why salted hashes are insecure for storing passwords But even if one password gets cracked, that will not automatically give you the password for every user who might have used it, since no user should have the same stored hash.
What does it mean to salt the password?
hashed and salted
Passwords are often described as “hashed and salted”. Salting is simply the addition of a unique, random string of characters known only to the site to each password before it is hashed, typically this “salt” is placed in front of each password.
When should you hash a password?
Hashing is a one-way function (i.e., it is impossible to “decrypt” a hash and obtain the original plaintext value). Hashing is appropriate for password validation. Even if an attacker obtains the hashed password, they cannot enter it into an application’s password field and log in as the victim.
What is hashing and salting a password?
Hashing is a one-way function where data is mapped to a fixed-length value. Hashing is primarily used for authentication. Salting is an additional step during hashing, typically seen in association to hashed passwords, that adds an additional value to the end of the password that changes the hash value produced.
How to Salt a password on the client side?
On the client side generate the salt using the username (or whatever user data is available) assuming it is unique. Then you generate the hash on the concatenated password and salt and send it on the server. On the server side, you calculate the salt using the same salting function in the client with the username as the input.
How to do client + server side hashing?
First, generate a “salt” from the user email and extend it with padding like this: The hashed password will be the actual password of the user, and it will be sent to the server and the server will calculate another hash of that hash.
What happens if there is no salt to hash passwords?
Attacker can arrive to conclusion that there’s no salts or using a weak algo to hash the passwords. If they find a lot of the same hashes, sign that server has a default password and every new acct has a default password. The kinds of attacks we’re talking about here are offline attacks against compromised/exfiltrated data.
What happens when a hash is sent to the server?
The hashed password will be the actual password of the user, and it will be sent to the server and the server will calculate another hash of that hash. I’m posting this here because I came up with this on my own and I feel like something is missing or wrong here, as they say about cryptography you shouldn’t invent it yourself.