/**
* Override the setPrivateKey method
*
* Override the parent method to store a binary representation of the private key as well.
*
* @param string $privateKey
* @return Zend_Service_ReCaptcha_MailHide
*/
public function setPrivateKey($privateKey)
{
parent::setPrivateKey($privateKey);
/* Pack the private key into a binary string */
$this->_privateKeyPacked = pack('H*', $this->_privateKey);
return $this;
}
