code: public void encrypt(File src, File dest) throws GeneralSecurityException, IOException {
  		InputStream is = null;
  		OutputStream os = null;
  		try {
  			is = new FileInputStream(src);
  			os = encryptor.wrapOutputStream(new FileOutputStream(dest));
  			copy(is, os);
  		} finally {
  			if(is != null) {
  				is.close();
  			}
  			if(os != null) {
  				os.close();
  			}
  		}
  	}
docs: <p>Reads and encrypts file <code>src</code> and writes the encrypted result to file <code>dest</code>.</p>
  @param src the source file
  @param dest the destination file
  @param src
  @param dest
  @throws FileNotFoundException
  @throws GeneralSecurityException
  @throws IOException