You are missing something. I don't blame you. Almost every description of quantum cryptography forgets to mention this step, and without it you are indeed vulnerable to a man in the middle attack.
The thing is, there is something similar to a one time pad but for authentication instead of encryption. See universal hashing. You authenticate your messages over the classical channel with universal hashing using a little bit of key generated from a previous round. Eve doesn't have this key so she cannot forge messages. Just like with one time pads you cannot reuse the key, but unlike one time pads you can authenticate large messages using a small key so you can make sure you lose less key material each round than you gain from running the protocol.
Yes, they are called bits or bytes. The entropy of your bedroom is simply the number of bytes you need to keep in your head to remember where everything is.
NASA doesn't have to pay Big Media for any spot. All they have to do is copy their candidate screening process. If people spend endless hours watching unstable crazy people do boring things in a boring house but won't watch stable people do cool stuff in zero g orbiting our planet, the solution looks simple. Bring the crazies to orbit, and everyone will watch NASA TV.
The headline says that they have detected the atmosphere, but the the actual article only claims that they have measured different temperatures on different sides of the planet. While that is a very impressive result, it is not at all what I would call detecting its atmosphere -- since the graphs in the article only show brightness it is not clear that surface is not made of cheese. The article does claim that it is a known gas planet, which I guess makes any temperature measurement of the planet a measurement of the temperature of its atmosphere, but the headline still sounds wrong. If I just measure the surface temperature of our moon I wouldn't claim to have detected regolith on the moon, even though we know from before that the moon surface is mostly regolith so technically I must have measured the temperature of the regolith.
I don't know if they did detect something more than what is stated in the article that actually has anything to do with the atmosphere. At the very least the atmosphere part of the headline needs some more explanation. A question seems very much in place.
Better yet, choose your software so that if the developers or support misbehaves and introduce bugs you can turn to anybody else, on a free market, without having to change to some different software. If Oracle misbehaves, not only can you not sue them in practice, but there is a good chance that you will still be stuck with them since changing to something else is too expensive. If you choose an open source solution you can always turn to someone else. The worst that can happen is that they will have to fork the code, but even that might not be needed.
Of course it is stuck in a prisoner's dilemma. So is everybody else on any type of market, and that is a good thing. Car manufacturers would make more money if they all doubled their prices, but they can't because of the prisoner's dilemma. Car buyers would get cheaper cars if they all refused to pay todays prices, but they can't because they are stuck in a prisoner's dilemma. In fact, market economy would not work if the participants were not stuck in prisoner's dilemmas. That is why there are laws against cartels and monopolies; they are ways for some actors to avoid the dilemma and set their own price based on just the buyers or sellers while ignoring their competition.
The FSF does not rely on copyright law. Free software is certainly possible without copyright. GNU GPL on the other hand relies on some sort of copyright, but it can be implemented with a far weaker copyright than the current one.
No, it's not faster than otp transported by courier. In both cases you have to transfer something with courier before you can start transmitting, and in both cases you can do that long before you want start transmitting so there is no lag when you decide to transmit.
Also, in both cases you have to make sure your courier hasn't been mugged. With otp transported by courier you just have to make sure the pad has not been copied. With QKD you have to make sure both that the initial key has not been copied and that the device itself has not been tampered with.
No it can't. It requires an initial hand-couriered secure key before it can be used securely. The only difference is that the initial key can be smaller than the data you want to encrypt, but transporting huge amounts of data is easy enough that that's a pretty small advantage.
You are going to have to give a real example. If the tab delimited line looks like it is at the right indent level it will behave as if it is on the right indent level.
One problem some people seem to have is that they display a tab in some non-standard way, e.g. with a tab stop of four columns instead of the correct eight columns. Then identical looking code will indeed behave in different ways. But that problem is not unique to whitespace or to Python. If you have a file viewer that displays the character "q" as "f", then the words "foo" and "qoo" will look the same but behave differently in just about any language.
I thought that we had passed the era when all words looked cooler by prefixing them with "e-" a long time ago. In this case it doesn't just look silly, it also makes it very ambiguous.
Long time ago, I used to use one of those as a remote to a TV that did not have a real remote. Whenever I fired the lighter the TV would switch to channel 1.
Re:"particles known as protons?"
on
LHC Success!
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· Score: 0
Yes, knowing it's a particle definitely makes the article make much more sense, even if people don't know anything about the specific particle.
It's like when I accidentally see some article about something happening during some sports match or game. There can be a long article about it with different names of competitions and players that I have never heard of. Those articles would make much more sense if the journalist had bothered to at least once write what sport they are talking about.
Re:The LHC should be destroyed
on
LHC Success!
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· Score: 0
You speak as if you argue that the LHC is safe, but you're using the same misconceptions as the ones you seem to argue against.
In our current understanding of the universe, black holes do not form in our atmosphere, and there are of course no black holes in the center of Earth.
I'm not sure which to be more disappointed in -- the fact that the commenter claiming your idea wouldn't work didn't know the difference between a cell phone antenna and a cell phone camera, or that he nonetheless managed to convince you.
And if you have a 99% tariff on work produced by machines, a lot of manual human labor becomes competitive. But why would you want that? That will make everyone poorer.
I find it funny in a sad way that someone who argues for closed borders and boycotting poor workers for no other reason that they are foreigners is calling other people racists.
There were people like you around when machines started being able to do some of the work traditionally done by humans. They actively tried to ban machines because they "took our jobs away". If they had succeeded, their society would have been much poorer, and we would today live in what we now would consider extreme poverty.
To be concrete, this:
When you buy the same widget for $0.10, you're injecting capital into the offshore trading partner's economy and gaining nothing in return.
If only there was an incentive structure so that each individual could make their own trade offs and be appropriately penalized for wasting resources and rewarded for creating resources. That way everyone could decide what is important for them and we could laugh at the people preaching their own priorities to the world the same way we laugh at other religious fundamentalists.
Oh, wait there is. It's based around money which has been around for many thousands of years.
Heck, we still dont know what the real biological effects are of various electrical fields
What would be really interesting would be the long-term biological effects. Once some species figures out that there is a virtually unlimited power source that does not require them to run around chasing food all the time interesting things should start happening. Plants have figured out that sunlight enables them to mostly just stand there and convert it to energy, but if the field Tesla planned was to be of any practical use you should be able to get much more power from a much smaller volume than with sunlight, and you would not have to compete with others about being on top and not being in the shadow.
Those consequences are very long term, but would be quite interesting. After they have grown big enough we would probably have to shut down the field, put samples of the new species in magnetic field zoos, and watch the others die. Or maybe it would be enough to just adjust the frequency or some other parameter to a value that they cannot handle.
That sounds like the broken window fallacy. Getting the same stuff cheaper is always better.
I assume you realize that it's not one full time job that is optimized away. In order for India to do work for the U.S. the U.S. needs to do work in return. The point of outsourcing is that the U.S. needs to do less for India in return for the job than if the did everything within the border, and India needs to do less for the U.S. than if it did whatever the U.S. is doing in return inside their border. Everyone is better off. And of course, people won't just sit idle and work less when they can get the same goods for less work, just as people did not stop working when machines could do some of the same jobs as humans. In practice, it's more stuff for the same or slightly less amount of work, not the same amount of stuff for less work.
Slashdot Mirror
You are missing something. I don't blame you. Almost every description of quantum cryptography forgets to mention this step, and without it you are indeed vulnerable to a man in the middle attack.
The thing is, there is something similar to a one time pad but for authentication instead of encryption. See universal hashing. You authenticate your messages over the classical channel with universal hashing using a little bit of key generated from a previous round. Eve doesn't have this key so she cannot forge messages. Just like with one time pads you cannot reuse the key, but unlike one time pads you can authenticate large messages using a small key so you can make sure you lose less key material each round than you gain from running the protocol.
Yes, they are called bits or bytes. The entropy of your bedroom is simply the number of bytes you need to keep in your head to remember where everything is.
All I see on the excerpt page is a text describing that it is an excerpt, but there is no actual content. Do I win or lose?
Wow. That's like claiming that the only reason people want to escape from North Korea is that they are too cheap to pay their taxes.
NASA doesn't have to pay Big Media for any spot. All they have to do is copy their candidate screening process. If people spend endless hours watching unstable crazy people do boring things in a boring house but won't watch stable people do cool stuff in zero g orbiting our planet, the solution looks simple. Bring the crazies to orbit, and everyone will watch NASA TV.
Mod parent up, it is not a troll.
The headline says that they have detected the atmosphere, but the the actual article only claims that they have measured different temperatures on different sides of the planet. While that is a very impressive result, it is not at all what I would call detecting its atmosphere -- since the graphs in the article only show brightness it is not clear that surface is not made of cheese. The article does claim that it is a known gas planet, which I guess makes any temperature measurement of the planet a measurement of the temperature of its atmosphere, but the headline still sounds wrong. If I just measure the surface temperature of our moon I wouldn't claim to have detected regolith on the moon, even though we know from before that the moon surface is mostly regolith so technically I must have measured the temperature of the regolith.
I don't know if they did detect something more than what is stated in the article that actually has anything to do with the atmosphere. At the very least the atmosphere part of the headline needs some more explanation. A question seems very much in place.
Better yet, choose your software so that if the developers or support misbehaves and introduce bugs you can turn to anybody else, on a free market, without having to change to some different software. If Oracle misbehaves, not only can you not sue them in practice, but there is a good chance that you will still be stuck with them since changing to something else is too expensive. If you choose an open source solution you can always turn to someone else. The worst that can happen is that they will have to fork the code, but even that might not be needed.
Of course it is stuck in a prisoner's dilemma. So is everybody else on any type of market, and that is a good thing. Car manufacturers would make more money if they all doubled their prices, but they can't because of the prisoner's dilemma. Car buyers would get cheaper cars if they all refused to pay todays prices, but they can't because they are stuck in a prisoner's dilemma. In fact, market economy would not work if the participants were not stuck in prisoner's dilemmas. That is why there are laws against cartels and monopolies; they are ways for some actors to avoid the dilemma and set their own price based on just the buyers or sellers while ignoring their competition.
The FSF does not rely on copyright law. Free software is certainly possible without copyright. GNU GPL on the other hand relies on some sort of copyright, but it can be implemented with a far weaker copyright than the current one.
No, it's not faster than otp transported by courier. In both cases you have to transfer something with courier before you can start transmitting, and in both cases you can do that long before you want start transmitting so there is no lag when you decide to transmit. Also, in both cases you have to make sure your courier hasn't been mugged. With otp transported by courier you just have to make sure the pad has not been copied. With QKD you have to make sure both that the initial key has not been copied and that the device itself has not been tampered with.
No it can't. It requires an initial hand-couriered secure key before it can be used securely. The only difference is that the initial key can be smaller than the data you want to encrypt, but transporting huge amounts of data is easy enough that that's a pretty small advantage.
You are going to have to give a real example. If the tab delimited line looks like it is at the right indent level it will behave as if it is on the right indent level.
One problem some people seem to have is that they display a tab in some non-standard way, e.g. with a tab stop of four columns instead of the correct eight columns. Then identical looking code will indeed behave in different ways. But that problem is not unique to whitespace or to Python. If you have a file viewer that displays the character "q" as "f", then the words "foo" and "qoo" will look the same but behave differently in just about any language.
I thought that we had passed the era when all words looked cooler by prefixing them with "e-" a long time ago. In this case it doesn't just look silly, it also makes it very ambiguous.
Long time ago, I used to use one of those as a remote to a TV that did not have a real remote. Whenever I fired the lighter the TV would switch to channel 1.
Yes, knowing it's a particle definitely makes the article make much more sense, even if people don't know anything about the specific particle.
It's like when I accidentally see some article about something happening during some sports match or game. There can be a long article about it with different names of competitions and players that I have never heard of. Those articles would make much more sense if the journalist had bothered to at least once write what sport they are talking about.
You speak as if you argue that the LHC is safe, but you're using the same misconceptions as the ones you seem to argue against.
In our current understanding of the universe, black holes do not form in our atmosphere, and there are of course no black holes in the center of Earth.
I'm not sure which to be more disappointed in -- the fact that the commenter claiming your idea wouldn't work didn't know the difference between a cell phone antenna and a cell phone camera, or that he nonetheless managed to convince you.
No, not using ISO units. English is a much bigger language than Chinese, regardless of what the myth says.
But, being firmly American, I still say we don't need the metric system. Damn those foreign rulers anyway.
The irony is that stubbornly refusing to speak the same language as the rest of the world is a very French thing to do.
And if you have a 99% tariff on work produced by machines, a lot of manual human labor becomes competitive. But why would you want that? That will make everyone poorer.
I find it funny in a sad way that someone who argues for closed borders and boycotting poor workers for no other reason that they are foreigners is calling other people racists.
When you buy the same widget for $0.10, you're injecting capital into the offshore trading partner's economy and gaining nothing in return.
is wrong. You get a widget in return.
If only there was an incentive structure so that each individual could make their own trade offs and be appropriately penalized for wasting resources and rewarded for creating resources. That way everyone could decide what is important for them and we could laugh at the people preaching their own priorities to the world the same way we laugh at other religious fundamentalists.
Oh, wait there is. It's based around money which has been around for many thousands of years.
Heck, we still dont know what the real biological effects are of various electrical fields
What would be really interesting would be the long-term biological effects. Once some species figures out that there is a virtually unlimited power source that does not require them to run around chasing food all the time interesting things should start happening. Plants have figured out that sunlight enables them to mostly just stand there and convert it to energy, but if the field Tesla planned was to be of any practical use you should be able to get much more power from a much smaller volume than with sunlight, and you would not have to compete with others about being on top and not being in the shadow.
Those consequences are very long term, but would be quite interesting. After they have grown big enough we would probably have to shut down the field, put samples of the new species in magnetic field zoos, and watch the others die. Or maybe it would be enough to just adjust the frequency or some other parameter to a value that they cannot handle.
That sounds like the broken window fallacy. Getting the same stuff cheaper is always better.
I assume you realize that it's not one full time job that is optimized away. In order for India to do work for the U.S. the U.S. needs to do work in return. The point of outsourcing is that the U.S. needs to do less for India in return for the job than if the did everything within the border, and India needs to do less for the U.S. than if it did whatever the U.S. is doing in return inside their border. Everyone is better off. And of course, people won't just sit idle and work less when they can get the same goods for less work, just as people did not stop working when machines could do some of the same jobs as humans. In practice, it's more stuff for the same or slightly less amount of work, not the same amount of stuff for less work.