How can individual salts improve the security of password hashing in PHP scripts, especially in scenarios where multiple users may have the same password?

When multiple users have the same password, using individual salts for each user can improve the security of password hashing in PHP scripts. By generating a unique salt for each user and combining it with their password before hashing, even users with the same password will have different hashed values, making it harder for attackers to crack passwords through techniques like rainbow tables. 

// Generate a unique salt for each user
$salt = bin2hex(random_bytes(16));

// Combine the salt with the user's password and hash it
$hashed_password = hash('sha256', $salt . $password);

// Store the hashed password and salt in the database
// Make sure to store the salt along with the hashed password for each user

Keywords

salts password hashing security PHP scripts multiple users

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