Bod
Box Of Doom. BOD. Says it all.
9 publicly visible posts • joined 7 Dec 2012
I cannot think of any secure comms protocol that has not had security holes in the past. I doubt very much that any secure comms protocol in existence is completely without security holes that can be exploited in the future.
If ever this comes about, terrorists will pump a lot of time and effort into figuring out how to hack into this. Not only will they be able to cause a single car to swerve over to the wrong side of the road, it will first pass this message to other cars in the vicinity. Instant carnage.
Actually, given some of the stuff reported recently in El Reg, perhaps it will take very little time and effort to hack such a system.
Sure, it's bad design. You can't easily determine orientation visually even when both parts are in plain sight (you need reasonable eyesight and light to see clearly into the connector).
Of course, you can do it by feel. But if you get it wrong and don't feel the resistance you can push too hard and break the plastic inner thingy (I've done that once). A more resilient form of polarization, such as found on mini-and micro-USB would be an improvement. Of course, somebody stupid enough can still force it in and damage it (3 of my neghbours are prime candidates for doing this).
A better design would be like the power connector on a mac mini - it will go in either way around and you'd have to be really strong and stupid to plug it in at 90 degrees to the correct orientation. But I expect Apple has a patent, trademark and registered design on connectors looking even vaguely like that one.
So live with it being naff. Except it's worse than you thought. The design is such that one of the connectors will wear out a lot quicker than the other. Guess which connector is on the PC and which is on the cheap-to-replace cable.
L2 is not stable, although a halo orbit close to (not around) L2 is. At L2 a modest expenditure of delta-V is occasionaly required to nudge it back into place. The same applies to L1 and L3.
In contrast, L4 and L5 are far more stable. Not perfectly so, because of perturbations (mainly from Jupiter and Saturn), but far less correction is required than for L1, L2 and L3.