Come back when you have understood this and have a coherent argument to make because you don't have the faintest idea what you're talking about. That post is meaningless. There are plenty of 'security experts' who are telling us this is a problem (teething issues......please.......
), I know very well what a man-in-the-middle attack is because that's where garages come in and public/private keys are a little bit meaningless when you start storing them in close proximity or in the same place.
These key systems are inherently broken as they stand. As simple as.