Salt enhances the difficulty of guessing in the UNIX login authentication procedure by a factor of ten. The salt, on the other hand, is saved in the same file as plaintext, in the same entry as the...

Salt enhances the difficulty of guessing in the UNIX login authentication procedure by a factor of ten.

The salt, on the other hand, is saved in the same file as plaintext, in the same entry as the hashed password.

As a result, if an attacker has knowledge of the salt and hashed password from the password file, the password does not need to be guessed.

Why is it claimed that salt boosts security?