FrontEnd.java

import java.util.*;

import javax.crypto.SecretKey;
import javax.management.RuntimeErrorException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SealedObject;
import java.security.SecureRandom;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.rmi.RemoteException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
import java.io.File;  // Import the File class
import java.io.FileInputStream;

import javax.crypto.BadPaddingException;
import java.io.*;

public class FrontEnd { // initialize replicas

    public FrontEnd() {

    }
}