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Comment Re:Groundbreaking was awesome (Score 1) 105

That's... amazing. Color me incredibly jealous.

I'd guess they were throwing away nearly all that aperture -- to get all the scope's light through a 4mm exit pupil, you'd need close to 2000x magnification, which would make the nebula look like it was about 24 degrees across -- okay, that would fit perfectly into a normal field of view.

So, yeah. I hate you even more.

(Wonder what kind of 4mm lens could successfully catch all the light from a system that size? It's been a long, long time since I was immersed in the amateur-telescope-maker literature...)

The exit pupil of the eyepiece is probably more like 20 mm, so that the observers don't have to get their eye exactly in the right place. Wastes a lot of light. I was there last time they put an eye piece on Magellan. I remember being able to spot four moons by moving my eye around, but I no longer remember if it was Jupiter or Saturn.

Comment widen your horizon a bit (Score 1) 238

Just a suggestion that you might want to widen your horizon a bit. Most of what you've been doing is related to number theory. You might consider topology (mobius strips), geometry (compass and ruler), real numbers (show pi is irrational), platonic solids (wikipedia has some you can print, cut out, and fold), zeno's paradoxes (there a many), probability (die rolls and coin tosses), and almost any basic physics demonstration.

Comment Re:A secure backdooor? (Score 1) 179

Is he claiming he found a way to safely have backdoored communications?

Not sure what "safely backdoored" means. The system is spread out amongst many different countries in such a way that many different governments must agree to use the back door. If the USA, the Netherlands, and Russia can agree, for example, then it is probably criminal investigation and not spying going on. I reviewed many of the early drafts of this paper. It's pretty cool.

Just because something is criminal does not mean it should be criminal per our system of morals and ethics. Free speech in China or Saudi Arabia, for example.

As well, governments will cooperate on issues that may not be illegal but are inconvenient to them, for whatever reason.

You place too much confidence in government doing the right thing.

Actually I have absolute confidence that most governments will do the wrong thing. But if a system exists for which a diverse set of governments must agree, then doing anything, right or wrong, is more difficult. Not impossible, just difficult.

Comment Re:A secure backdooor? (Score 1) 179

The system is spread out amongst many different countries in such a way that many different governments must agree to use the back door. If the USA, the Netherlands, and Russia can agree, for example, then it is probably criminal investigation and not spying going on.

I can't believe you could be that naive.

Look up the definition of "probably."

Comment Re:A secure backdooor? (Score 1) 179

That's like the UN Security Council. If China, France, Russian Federation, the United Kingdom, and the United States agree, they can do what they want.

That would probably mean their police agencies deciding among themselves.

Let's look at real cases.

If you had a news service, like Wikileaks, that managed to annoy all of them (as a good news organization should do), they could agree to go after that news organization.

And what are the politically-correct grounds for using the back door? Child pornography? Human trafficking? Tax evasion? Drug dealing? Bribery? Terrorism? Capital crimes? Weapons of mass destruction? Waging war?

What if Miss "A" claims that Julian Assange raped her on one night, though she had enthusiastic sex the nights before and after?

Yup. I think you summarized it pretty well. However, the point is to provide a channel of secure communication that requires a relatively high barrier to overcome. The alternative is for these same governments to ban secure communication completely. You make the call.

Comment Re:So basically.. (Score 1) 179

What I'm taking away from this is that anything David ever has made or will make in the future should not be trusted.

So you would prefer to trust someone that promises that there is no back door (like, say, Juniper, AT&T, etc), or someone that states up front that there is one that requires multi-national agreement to use?

Comment Re:A secure backdooor? (Score 4, Informative) 179

Is he claiming he found a way to safely have backdoored communications?

Not sure what "safely backdoored" means. The system is spread out amongst many different countries in such a way that many different governments must agree to use the back door. If the USA, the Netherlands, and Russia can agree, for example, then it is probably criminal investigation and not spying going on. I reviewed many of the early drafts of this paper. It's pretty cool.

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