public function encryptWorkbook($encryptionType = 'XOR', $password = '', $keyLength = '')
    {
        //Build JSON to post
        $fieldsArray['EncriptionType'] = $encryptionType;
        $fieldsArray['KeyLength'] = $keyLength;
        $fieldsArray['Password'] = $password;
        $json = json_encode($fieldsArray);
        $strURI = Product::$baseProductUri . '/cells/' . $this->getFileName() . '/encryption';
        $signedURI = Utils::sign($strURI);
        $responseStream = Utils::processCommand($signedURI, 'POST', 'json', $json);
        $json_response = json_decode($responseStream);
        if ($json_response->Code == 200)
            return true;
        else
            return false;

    }