[Megan]

The equation Is pretty simple. "If It can be done, It can be undone".

Everything, and I mean everything, can be hacked. Whether It's via technical/hardware gateways or human manipulation via social engineering (or a combination of both), there's ALWAYS a way In.

MD5

Before you say anything about rainbow tables etc, that's not them being undone, it's a brute force attack not the algorithm being cracked and reversed so it's like "if it can be done, we'll just smash it open".

But I get your point, simplicity is the best option but unfortunately as devices get more and more complex it will be ever unlikely they stay simple.