How does the principle of "password salting" contribute to password security?a.It adds flavor to passwords for better user experienceb.It involves seasoning passwords with additional characters to make them more complexc.It prevents rainbow table attacks by adding a random value to each password before hashingd.It requires users to change their passwords regularly

The principle of "password salting" contributes to password security primarily through option c. It prevents rainbow table attacks by adding a random value, known as a 'salt', to each password before hashing.

Here's a step-by-step explanation:

1. A salt is a random piece of data generated for each user when they create their password. This salt is then appended or prepended to the password.

2. The salted password (the original password plus the salt) is then put through a cryptographic hash function, which transforms it into a hashed value.

3. This hashed value is what's stored in the system, not the user's original password.

4. When a user tries to authenticate, the system takes the entered password, adds the salt (which is stored and unique for each user), hashes this combination, and compares it to the stored hashed value.

5. If the values match, the password is correct and the user is granted access.

6. The addition of the salt means that even if two users have the same password, their hashed values will be different because their salts are different.

7. This method also protects against rainbow table attacks. A rainbow table is a precomputed table for reversing cryptographic hash functions. By adding a unique salt to each password, it makes it nearly impossible for an attacker to use a rainbow table to crack the password, because they would need a different table for each possible salt.