code: public String decrypt(String message) throws GeneralSecurityException {
  		byte[] bytes = Base64.getDecoder().decode(message);
  		return new String(encryptor.decrypt(bytes));
  	}
docs: <p>Base64 decodes and decrypts an encrypted message.</p>
  @param message an encrypted message
  @return the decrypted message
  @throws GeneralSecurityException