try {
// First, we need a key; we'll just generate one
// though we could look one up in the keystore or
// obtain one via a key agreement algorithm
KeyGenerator kg = KeyGenerator.getInstance("DES");
Cipher c = Cipher.getInstance("DES/CBC/PKCS5Padding");
Key key = kg.generateKey();
// Now we'll do the encryption. We'll also retrieve
// the initialization vector, which the engine will
// calculate for us.
c.init(Cipher.ENCRYPT_MODE, key);
byte input[] = "Stand and unfold yourself".getBytes();
byte encrypted[] = c.doFinal(input);
byte iv[] = c.getIV();
// Now we'll do the decryption. The initialization
// vector can be transmitted to the recipient with
// the ciphertext, but the key must be transmitted
// securely.
IvParameterSpec dps = new IvParameterSpec(iv);
c.init(Cipher.DECRYPT_MODE, key, dps);
byte output[] = c.doFinal(encrypted);
System.out.println("The string was ");
System.out.println(new String(output));
} catch (Exception e) {
e.printStackTrace();
}
