Guardar a key(Criptografia)

package teste;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;

import uteis.criptografia.CriptoUtils;

public class JCETeste	{

	public static void main(String[] args) throws Exception	{
		try	{	
			//obtem a chave
			KeyGenerator keyGen = KeyGenerator.getInstance("DES");
			SecretKey desKey = keyGen.generateKey();
			
			//inicializa o cipher para criptografar
			Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
			desCipher.init(Cipher.ENCRYPT_MODE, desKey);
			//texto a ser criptografado
			byte[] clearText = "Isto é apenas um exemplo!".getBytes();
			//criptografar o texto
			byte[] cipherText = desCipher.doFinal(clearText);

			//inicializa o cipher para descriptografar
			desCipher.init(Cipher.DECRYPT_MODE, desKey);
			//descriptografa o texto
			byte[] clearText1 = desCipher.doFinal(cipherText);

		}
		catch(NoSuchPaddingException nspe)	{
			nspe.printStackTrace();
		}
		catch(NoSuchAlgorithmException nsae)	{
			nsae.printStackTrace();
		}
		catch(IllegalBlockSizeException ibse)	{
			ibse.printStackTrace();
		}
		catch(BadPaddingException bpe)	{
			bpe.printStackTrace();
		}
		catch(InvalidKeyException ike)	{
			ike.printStackTrace();
		}
		catch(Exception e)	{
			e.printStackTrace();
		}
	}
}