Should I Only Store the Salt When Using PHP 5.5's `password_hash()` for Password Security?

Password Security with PHP 5.5's password_hash and password_verify Functions

Query:

When storing passwords securely using PHP 5.5's password_hash() function, is it appropriate to only store the salt in the database?

Answer:

No. For enhanced password security, it is essential to store both the hash and salt in the database. password_hash conveniently generates a string that includes both elements.

Recommendations:

To implement secure password storage:

1. Generation: Use password_hash() to create a hashed password: $hashAndSalt = password_hash($password, PASSWORD_BCRYPT);
2. Storage: Insert $hashAndSalt into the database for the corresponding user.
3. Verification: To verify a submitted password, retrieve the stored $hashAndSalt from the database and use password_verify(): password_verify($password, $hashAndSalt)

Additional Considerations:

• Security Practices: Utilize mysqli instead of the outdated ext/mysql to improve security.
• SQL Injection Prevention: Understand and mitigate the risks of SQL injection by following best practices (e.g., prepared statements).

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