Question on md5() and others

[KS30]

Hi All,
I recently used the function md5() to secure a password on a form I had to create. I found there were other functions such as crc32() or sha1(). Is md5() the most secure and if so why would you use the others?

Thank you!!

[freshnet]

md5 is not very secure. You're better of using something like bcrypt:

Code: Select all

$key = 'password to (en/de)crypt';
$string = 'string to be encrypted ';

$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key))));

$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($encrypted), MCRYPT_MODE_CBC, md5(md5($key))), "\0");