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October 24, 2014, 02:39:33 AM |
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Hi BitcoinCitizen86403, I enjoyed your little hoax, but in case anyone is worried about the security of their bitcoins because of BitIndex let me put you at ease with some simple calculations which will help to put the security of bitcoin in perspective.
There are exactly 2^160 possible bitcoin addresses, which translates to 1.46 * 10^48. The reason BitcoinCitizen86403 had some of us concerned is because we humans can't conceive of such enormous numbers. Let's make them easier to grasp.
1. Imagine that every possible bitcoin address is a molecule of water. It is trivial to calculate that 1.46 * 10^48 / 6 * 10^23 (Avagadro's number) is 2.44 * 10^24 moles. Multiply by the molecular weight of water (18) gives us a mass of 4.38 * 10^25 grams. And as 1 cubic centimeter of water also weighs 1 gram we can calculate the volume of the droplet of water, which turns out to be 44 billion cubic kilometers. Using the formula Vol = 4/3 πr^3 we can now calculate that the diameter of the 'droplet' would be 4376km. This would be 32 times the volume of ALL the water on earth, including oceans, rivers, lakes, polar ice etc. Or to put it another way, our existing moon is 3475km in diameter - 900km less than Bitmoon.
2. You stated on your blog that after four months you had reached address 1,325,000,000,000,000. And you ask us to believe that you actually found an address with a non-zero balance among them. Quite impressive to have archived and checked 1,325 trillion addresses for bitcoin balances, but let's put that on our water scale. A droplet of 1,325 trillion water molecules would have a diameter of 0.04mm. That is about the size of a pollen grain.
3. On blockchain.info you can check the number of unique bitcoin addresses currently in use (ie non-zero). This is about 200,000. 200,000 water molecules would make a droplet 22 nanometers in diameter. About the size of a virus.
4. So, if we are to believe you, you have effectively succeeded in firing a pollen grain totally at random into the heart of Bitmoon and hitting, by chance, the one and only special particle (the size of a virus) which contains anything of value, which you say you declined to steal anyway.
5. Furthermore, if you continue to hash away at the problem with 10,000 times the computing power that you already have, after 100 years you will have archived 4 * 10^21 addresses. On our water scale this will make a droplet of 6mm diameter. So after spending your fortune along the way you can have your fun by firing a 6mm bullet instead of a pollen grain. Anyway I will not be losing sleep over it. I wish you the best of luck, but I think we are all safe from BitIndex.
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