import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.io.*;
import java.security.*;

public class Skey {
    public static void main(String args[]) throws Exception {
        KeyGenerator kg = KeyGenerator.getInstance("DESede");
        kg.init(168);
        SecretKey k = kg.generateKey();
        FileOutputStream f = new FileOutputStream("key1.txt");
        ObjectOutputStream b = new ObjectOutputStream(f);
        b.writeObject(k);
    }
}