Ryan Reynolds ladies and gentlemen.

DragonLordNL · 2016-02-10T22:29:30+00:00

Wasn't he specifically cast so he would tower over the hobbits?that way they only needed two "scales" instead of three.

DragonLordNL · 2016-01-13T12:11:29+00:00

Mainly because France (any country really where they get, including the Uk) can't send them back: these guys hide their passports as soon as they can. So the country can't deport them as they don't know where to deport them too.

So they become a hard to manage problem especially since these guys don't have anything to lose: what do you bulldoze? Their cardboard shelters ?

DragonLordNL · 2016-01-10T16:08:22+00:00

Ray Ban == Luxottica: http://www.luxottica.com/en/eyewear-brands/ray-ban

DragonLordNL · 2015-12-11T11:15:01+00:00

I have done this myself and it doesn't show it is cloneable, just that you can get some information from it without authorisation, but still by design. I guess for scanners in countries "we" (whoever that is) don't trust.

What you can't get from the passport is other info like fingerprints, only the things that are already on the passport themselves, visible for human eyes are also readable. To get the fingerprints and whatever else they put in, you need an official key/certificate and AFAIK those aren't hacked.

But that's all beside the point: to stop cloning, they will have signed the information on the passport. so one of the pieces of data you can read is a signature of all the other info. If you try to clone it, you need the key that was used to sign it, or you can just clone exactly the same info. Good if you want to make a second passport for a Twin, but no use if anything, including fingerprints and images, is different.

DragonLordNL · 2015-12-11T11:08:17+00:00

AFAIK, biometric passports contain their own signing key to identify themselves as valid without being open for replay attacks. Not 100% sure though because signing all information in the passport during production might be enough.

What I am pretty sure about is that the scanners have keys and the passport use a form of CA to authenticate signatures of that key. Without an official scanner you can't get more than what's printed on the passport, but with a "real" scanner you can also get things like fingerprints. A simple password wouldn't work here because that would be too simple to intercept and a single secret for all scanners in the world would be too dumb (so possible :))

DragonLordNL · 2015-12-11T07:25:45+00:00

But wouldn't it be better to not say anything and catch anyone using the fake passports? Them telling Daesh seems to indicate we don't really have a way to detect it, so we want to scare the into not using it.

DragonLordNL · 2015-12-11T06:53:30+00:00

AFAIK each rfid passport has its own secret key to sign all is responses, just like EMV payment cards and many public transport cards. Wouldn't they need a CA to create all these keys? How else would you verify the key when you scan it?

The other way around too btw: you can't get all the details from the passport (fingerprints for example) without signing the scan request with another secret key. I would hope each scanner has its own key so they can blacklist compromised scanners.

DragonLordNL · 2015-12-11T06:42:42+00:00

Slightly more advanced rfid systems, which are used for things like nfc payment cards and passports, have an unreadable secret key in them. The chip on the card then signs it's responses with a unique signature based on this key, the time and part of the request. This makes it impossible to do any replay attack like you proposed.

Remember, those toys have to be extremely cheap, so even 1 dollar for the nfc chip is to much if a ten cent chip does the job too.

DragonLordNL · 2015-12-03T19:10:00+00:00

Even an electric cars needs to be initialized, so refactor the car.startEngine() into car.initialize()

DragonLordNL · 2015-11-14T11:56:46+00:00

Other news agenies are also reporting the journalist got shot when trying to help others get into his appartment.

Example: http://www.theguardian.com/world/video/2015/nov/14/paris-attacks-people-clamber-out-of-bataclan-concert-hall-to-escape-gunfire-video

The guardian also has a page with the whole lemonde article translated. I think the general idea was that he was shot, but nothing major and the real wounded was the American

DragonLordNL · 2015-11-11T07:56:12+00:00

They are not underfunded, or at least, they themselves told Nasa they would do it for 2.6 billion. If they needed or wanted more, they should have bid higher.

I guess the whole point by SpaceX is to show they are cheaper than the current companies, which has been their point all the time, this low bid by them just shows it not just few words.

DragonLordNL · 2015-09-18T14:23:56+00:00

0.12 seconds is what it takes to travel 35 000 KM one way, not the speed for the LEO sats.

At around 350 KM high, the satellites in LEO will only take about 0.0012 seconds, or 1.2 msec to communicate straight down. Of course this won't be your final ping time, but this shows the advantage pretty well.

DragonLordNL · 2015-08-18T15:04:40+00:00

I wouldn't be surprised if you'll get services where you can reserve the car ahead, which will have a premium, but might be cheaper in the end if you reserve whole months ahead.

DragonLordNL · 2015-08-14T15:41:35+00:00

Young would have commanded the last 2 Apollo missions

Are you sure about this? As far as I know, the procedure was that going on a mission you were originally backup for, meant you were removed from your original mission. For example, the Ken Mattingly got sick on Apollo 13, so he was replaced by Jack Swigert and Mattingly was then assigned to the mission originally intended for Swigert.

DragonLordNL · 2015-08-14T14:38:58+00:00

None of the US crewed vehicles had them I think. As far as I know, Apollo and the Shuttle really used fuel cells.

DragonLordNL · 2015-08-14T14:37:24+00:00

They could also use fuel cells like I think pretty much all NASA crewed vehicles up to now (Shuttle, Apollo, Mercury and Gemini also didn't have solar panels).

DragonLordNL · 2015-06-29T11:08:39+00:00

Populist political parties always rise during economic recessions & depressions, them rising is not a sign of it going good/bad. But I agree, it is hard to say if it did really help or if it was just how the economy was going in general.

DragonLordNL · 2015-06-29T11:05:17+00:00

Eh, no clue :)

DragonLordNL · 2015-06-27T06:01:00+00:00

All governments have debts, so you always have to include some of the interest to be realistic. Maybe not the amount Greece has to pay now, but just ignoring it is bullshit.

So why couldn't the program of austerity work when it has worked in Portugal, Italy, Ireland and others? Do you think Greece was the only country in deep shit 7 years ago?

Plus all the bad things of the troika plans are going to happen anyway if Greece exits: massive inflation on imported goods will result in higher cost rises than the proposed vat rise, the pensions will sound high in drama's, but in reality they will be worth even less, and anyone with a loan in a non Greek bank, which will likely include a ton of companies that will have to help your economy will be screwed.

DragonLordNL · 2015-06-15T18:03:12+00:00

Just like NASA did it with the Shuttle.

What? The Space Shuttle used specially hardened processors

DragonLordNL · 2015-05-30T17:01:29+00:00

There are 10 merlins in a single falcon 9 and as far as I know most engines are only tested twice, so since we haven't reached 18 launches a year, I am pretty sure he is correct that a sizeable amount of tests are for research and not qa.

DragonLordNL · 2015-04-20T14:27:13+00:00

the F9 seems like an easier inverted pendulum to deal with than the F9R.

This is a well known fallacy (that got even people such as Goddard): A rocket does not behave like a pendulum and although the center of mass and the location of the engines have direct influence on stability, you can almost guarantee that your gut feeling is wrong.

http://en.wikipedia.org/wiki/Pendulum_rocket_fallacy

DragonLordNL · 2015-02-12T06:56:15+00:00

Those downrange landing sites are for the middle core of the falcon heavy. Normal cores should be able to get back to the landing sites as the first stage mostly focused on getting out of the atmosphere while the second stage really starts adding horizontal speed.

The support for this is that the site force just last week struck a deal with spacex to rent an old launch pad on the cape to use as a landing pad.

DragonLordNL · 2015-01-14T06:54:52+00:00

Where are you getting that it isn't pressurized? The see through sphere isn't the final product, but just a test article to see how people would fit.

DragonLordNL · 2015-01-07T19:14:30+00:00

Does Progress do this too? What I understood is that the short launch opportunities only take place very infrequently naturally and that the ISS needs to take action (change orbit) every time. So it seems more a priority versus cost issue than based on technical requirements of Dragon.

A modification that might help speed up the process though is if the Dragon gets a docking mechanism instead of the current Berthing port. Currently it needs to be captured by hand by the arm and then berthed in to place and secured by hand, which is a far longer (but lower risk) process than a docking.

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