How Can I Securely Implement bcrypt Password Hashing in PHP?

Using bcrypt for Password Hashing in PHP

bcrypt, a hashing algorithm known for its robustness, is a prevalent recommendation for securely storing passwords. However, PHP does not natively providebcrypt functions, leaving developers perplexed. This article clarifies the concept of bcrypt and guides you through its implementation in PHP.

What is bcrypt?

bcrypt is a hashing algorithm that utilizes the Eksblowfish encryption algorithm. Unlike Blowfish, which is reversible, bcrypt employs a one-way hashing mechanism, preventing password retrieval even with knowledge of the salt, rounds, and key (password).

Implementing bcrypt in PHP

PHP >= 5.5-DEV

Use built-in functions:

$hash = password_hash('password', PASSWORD_DEFAULT);
$isGood = password_verify('password', $hash);

PHP >= 5.3.7, < 5.5-DEV

Install the PHPass library from GitHub and use:

$hash = password_hash('password', PASSWORD_DEFAULT);
$isGood = password_verify('password', $hash);

PHP < 5.3.7 (DEPRECATED)

Use the Bcrypt class from the example above:

$bcrypt = new Bcrypt(15);
$hash = $bcrypt->hash('password');
$isGood = $bcrypt->verify('password', $hash);
Conclusion
The implementation of bcrypt in PHP showcased here provides secure and efficient password storage. Choose the method compatible with your PHP version and ensure the security of your user passwords.
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