Without CSS it still displays the encrypted image with the Encryption / Decryption - technique, doesn't it?
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAPAAAADwCAYAAAA+VemSAAAgAElEQVR4nLS96ZMUV5rm6x/Czd2P7+7h4REeHntkZETkvkAmCYh
A simple save page later, and I get your image. Bang.