Z8MtXVBW

1import java.io.File;
2import java.io.FileNotFoundException;
3import java.io.FileOutputStream;
4import java.security.*;
5import javax.crypto.*;
6
7public class DES 
8{
9    public static void main(String args[]) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, FileNotFoundException
10    {
11        /** //DES
12        KeyGenerator keygen = KeyGenerator.getInstance("DES");
13        SecretKey desKey = keygen.generateKey();
14        Cipher desCipher = Cipher.getInstance("DES");
15        
16        //encrypt
17        desCipher.init(Cipher.ENCRYPT_MODE, desKey);
18        byte[] ciphered_text = desCipher.doFinal("Suicide".getBytes());
19        System.out.println("Ciphered: "+ciphered_text);
20        //decrypt
21        desCipher.init(Cipher.DECRYPT_MODE, desKey);
22        byte[] decrypted_text = desCipher.doFinal(ciphered_text);
23        System.out.println("Decrypted: "+new String(decrypted_text));
24        **/
25        
26        //3DES
27      /**  KeyGenerator keygen = KeyGenerator.getInstance("DESede");
28        SecretKey desKey = keygen.generateKey();
29        Cipher desCipher = Cipher.getInstance("DESede");
30        
31        //encrypt
32        desCipher.init(Cipher.ENCRYPT_MODE, desKey);
33        byte[] ciphered_text = desCipher.doFinal("Suicide".getBytes());
34        System.out.println("Ciphered: "+ciphered_text);
35        //decrypt
36        desCipher.init(Cipher.DECRYPT_MODE, desKey);
37        byte[] decrypted_text = desCipher.doFinal(ciphered_text);
38        System.out.println("Decrypted: "+new String(decrypted_text));**/
39        
40        //AES
41        KeyGenerator keygen = KeyGenerator.getInstance("AES");
42        keygen.init(256);
43        SecretKey aesKey = keygen.generateKey();
44        Cipher aesCipher = Cipher.getInstance("AES");
45        
46        //encrypt
47        aesCipher.init(Cipher.ENCRYPT_MODE, aesKey);
48        
49        byte[] ciphered_text = aesCipher.doFinal("Suicide".getBytes());
50        System.out.println("Ciphered: "+ciphered_text);
51        //decrypt
52        aesCipher.init(Cipher.DECRYPT_MODE, aesKey);
53        byte[] decrypted_text = aesCipher.doFinal(ciphered_text);
54        System.out.println("Decrypted: "+new String(decrypted_text));
55        
56    }
57}