Salted hashes are a commonly used method of encrypting passwords and other sensitive information. A hash function is a mathematical algorithm that takes input data and produces a fixed-length string of characters, called a hash. In password storage, the hash is typically used to store one-way encryption of the user’s password, which can be compared to the hash of the password entered during login to authenticate the user.

A salted hash adds an additional layer of security to the hash by adding a random string of characters, called a salt, to the input data before hashing it. This salt is unique to each user and ensures that even if two users have the same password, their hashes will be different due to the different salts used. This makes it much more difficult for attackers to use pre-computed tables or rainbow tables to crack passwords.

For example, suppose a user sets their password as “password123”. Without salt, the hash of this password would always be the same, making it vulnerable to attack. However, with a salt, such as “ab#12f!s”, the input data becomes “password123ab#12f!s”, and the resulting hash is unique to that user’s password and salt combination.