private function getPublicKey() : Key
{
return new Key("-----BEGIN PUBLIC KEY-----\n" . "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE7it/EKmcv9bfpcV1fBreLMRXxWpn\n" . "d0wxa2iFruiI2tsEdGFTLTsyU+GeRqC7zN0aTnTQajarUylKJ3UWr/r1kg==\n" . "-----END PUBLIC KEY-----");
}