The longer password hash format has better cryptographic properties, and client authentication based on long hashes is more secure than that based on the older short hashes.
To accommodate longer password hashes, the Password column in the user table was changed at this point to be 41 bytes, its current length.
For developpers, a MySQL hash can be computed with :
// PHP code
$sha1_hex = sha1(sha1($string,true);
How to crack those hashes
You can paste your mysql323 hash (16-bytes) or MySQl 4.1/5+ hashes (40-bytes, without '*' !) in our system.
Note : This website can crack 100% of your "MySQL323" 16-bytes hashes. Bruteforce or/and collision are used.