title: Encryption with AES-256 Java
body: <p>I have this simple code, that i found on the internet.. im learning this stuff of encryption/decryption.. this code seems to work fine, but i don't understand something... why after the "c.doFinal()" (which is for encrypt/decrypt with AES-256) this guy encode/decode that encrypted value, with BASE64? its not enough only by using AES? </p>
  
  <pre><code>`private static final String ALGO = "AES";
   private static final byte[] keyValue = 
   new byte[] { 'T', 'h', 'e', 'B', 'e', 's', 't', 'S', 'e', 'c', 'r','e', 't', 'K', 'e', 'y' };
  
  
   public static String encrypt(String Data) throws Exception {
      Key key = generateKey();
      Cipher c = Cipher.getInstance("AES");
      c.init(Cipher.ENCRYPT_MODE, key);
      byte[] encVal = c.doFinal(Data.getBytes());
      String encryptedValue = new BASE64Encoder().encode(encVal);
      return encryptedValue;
  }
  
  public static String decrypt(String encryptedData) throws Exception {
      Key key = generateKey();
      Cipher c = Cipher.getInstance(ALGO);
      c.init(Cipher.DECRYPT_MODE, key);
      byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedData);
      byte[] decValue = c.doFinal(decordedValue);
      String decryptedValue = new String(decValue);
      return decryptedValue;
  }
  private static Key generateKey() throws Exception {
      Key key = new SecretKeySpec(keyValue, ALGO);
      return key;
  }
  
  public static void main(String[] args) throws Exception {
  
      String data = "SOME TEXT";
      String dataEnc = AES.encrypt(data);
      String dataDec = AES.decrypt(dataEnc);
  
      System.out.println("Plain Text : " + data);
      System.out.println("Encrypted Text : " + dataEnc);
      System.out.println("Decrypted Text : " + dataDec);
  }`
  </code></pre>
  
  <p>Thanks!!</p>