You can never have too many XKCD cartoons.
And this one is particularly relevant to a blog article I recently wrote. If this baffles you, take a look at The Looking Glass (Mal)War(e)* or Graham Cluley’s blog article and all should become clear.
XKCD’s cartoon is licensed under Creative Commons: see this XKCD page.
Small Blue-Green World
ESET Senior Research Fellow