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Comment Black hole maximum rotation speed (Score 1) 38

the outer edge of the mass exceeding the speed of light

That intuitively makes sense, but I thought part of the black hole cheat is that it doesn't have an edge. I thought they were literally singularities, with a circumference of zero. Apparently not the case?

How a thing with a circumference of zero could meaningfully "rotate" is beyond me, but I thought this (and many other suspected properties of rotating black holes) was supposed to be beyond my ignorant layman understanding!

Comment Choose protocol before choosing implementation (Score 2) 30

An adversary can coerce a proprietary software producer to compromise the code. That's what we're going to see here.

An adversary cannot time-travel to when a protocol was invented, and compromise the protocol. (Though I guess the NSA can come kind of close to that, by "helping" as it's being developed, w/out the time-travel part.) That's what we're not going to see here.

Ergo, proprietary apps will remain unable to provide secure messaging, but secure messaging will remain available to people who want it.

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