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Can a salting defend against brute force attacks Why?
Am I right? Salts prevent pre-computation attacks. They make it useless to pre-compute tables of hashes, such as rainbow tables. A dictionary attack is simple a special case of a brute force attack.
What is the possible solution for brute force attack?
The most obvious way to block brute-force attacks is to simply lock out accounts after a defined number of incorrect password attempts. Account lockouts can last a specific duration, such as one hour, or the accounts could remain locked until manually unlocked by an administrator.
When would a hacker use a brute force attack?
Brute force attacks are usually used to obtain personal information such as passwords, passphrases, usernames and Personal Identification Numbers (PINS), and use a script, hacking application, or similar process to carry out a string of continuous attempts to get the information required.
Why is it important to use salt for passwords?
With a correctly-chosen salt(i.e. if no two accounts have the same salt), the attacker has to start over for each hashed password. Furthermore, in a sense, all password cracking attempts are attempting to crack all accounts passwords at once.
Where does the salt go when hashing a password?
As shown in the example above, this makes the same password hash into a completely different string every time. To check if a password is correct, we need the salt, so it is usually stored in the user account database along with the hash, or as part of the hash string itself. The salt does not need to be secret.
Is there any point in storing salt in a separate file?
There’s no real point in storing salts in a separate file as long as they’re on a per-user basis – the point of the salt is simply to make it so that one rainbow table can’t break every password in the DB. I will provide a slightly different take on this.
What’s the advantage of having a random salt?
The advantage of having a salt is minimal if each user has a randomized salt because although it might make discovery of an individual’s password easier, the amount of force necessary to crack the passwords of the system overall will be high. In this level of discussion, that is really what the expectation is: to protect the passwords.