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321  Bitcoin / Bitcoin Discussion / Re: Bitbill Patent Published - Encompasses Physical Bitcoins and Paper Wallets on: August 05, 2013, 05:10:10 PM
An update from the USPTO basically they have accepted the bitcointalk forum posts as prior art:

https://docs.google.com/file/d/0B7nOVGhPgqTEY2FIenFpdVlNRzg/
https://docs.google.com/file/d/0B7nOVGhPgqTEdnowcS1jZm02d1U/

you can view more from the USPTO here:
http://portal.uspto.gov/pair/PublicPair
Use application number: 13/336,779

wow. That seems like the examiner is actually looking at this closely. Gavin, you're famous.

Isn't that just the kick back though, and he can continue prosecution of the patent?
322  Economy / Services / Re: Apple iPhone Factory Unlocking - Best Prices - Fastest Service on: August 05, 2013, 05:03:28 PM
Haven't bumped this for a while, so bump.

Still unlocking!
323  Economy / Service Discussion / Re: Satoshi Dice -- Statistical Analysis on: August 05, 2013, 02:44:38 PM
For the first time in 6 months or so the actual profit has fallen below the expected profit:

Quote
Fri Aug  2 22:00:23 2013 <2000  249879 64479531e6b10500:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    14.00000000 WIN    433.81195200
Fri Aug  2 22:00:23 2013 <8000  249879 4c25b2ebf96218c5:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    16.00000000 WIN    112.00627200
Fri Aug  2 22:17:38 2013 <8000  249881 2291621e4aec4bc2:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    19.00000000 WIN    133.00744800
Fri Aug  2 22:17:38 2013 <8000  249881 7dd823c9f952c211:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    19.00000000 WIN    133.00744800
Fri Aug  2 22:24:41 2013 <3000  249882 d6a8c1606d207050:0  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    10.00000000 WIN    203.26045333
Fri Aug  2 22:24:41 2013 <2000  249882 9bc62d6492914cce:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    14.00000000 WIN    433.81195200
Fri Aug  2 23:13:19 2013 <2000  249888 3c2c2383423b67ca:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET     9.00000000 WIN    278.87911200
Sat Aug  3 00:18:36 2013 <8000  249894 e5bd298c78b5b041:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    16.00000000 WIN    112.00627200
Sat Aug  3 00:47:06 2013 <2000  249898 94c98a54953fe74a:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET     9.00000000 WIN    278.87911200
Sat Aug  3 01:20:21 2013 <2000  249901 8265d0e515ed10b7:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    12.00000000 WIN    371.83881600
Sat Aug  3 01:32:53 2013 <2000  249903 0858e6e9cbd390ef:0  14VZsCa5mJeoDqGKHsssKiyy6fQF3Kt7JC BET    16.00000000 WIN    495.78508800
Sat Aug  3 02:07:50 2013 <2000  249907 a047ea9e86cbc7fe:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    14.00000000 WIN    433.81195200
Sat Aug  3 02:07:50 2013 <8000  249907 a047ea9e86cbc7fe:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    18.00000000 WIN    126.00705600
Sat Aug  3 02:21:07 2013 <8000  249910 97fde91e84861ced:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    18.00000000 WIN    126.00705600
Sat Aug  3 02:43:06 2013 <12000 249914 97fde91e84861ced:1  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    25.00000000 WIN    108.38153333
Sat Aug  3 02:45:05 2013 <16000 249915 a047ea9e86cbc7fe:0  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    34.00000000 WIN    102.09166400
Sat Aug  3 05:30:27 2013 <2000  249935 1f904ef45a9cc20d:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    14.00000000 WIN    433.81195200
Sat Aug  3 05:30:27 2013 <2000  249935 3c3bf53f24545a4a:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET     9.00000000 WIN    278.87911200
Sat Aug  3 07:25:49 2013 <8000  249949 e99538384b9bd1dd:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    16.00000000 WIN    112.00627200
Sat Aug  3 08:26:26 2013 <8000  249954 08d0d0243d7b4ecc:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    19.00000000 WIN    133.00744800
Sat Aug  3 08:52:40 2013 <16000 249959 092107b244297c54:0  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    39.00000000 WIN    117.10514400
Sat Aug  3 10:49:03 2013 <2000  249983 84f202912be654ce:3  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    14.00000000 WIN    433.81195200
Sat Aug  3 10:51:55 2013 <16000 249984 19695bdd7f7b6db6:0  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    38.00000000 WIN    114.10244800
Sat Aug  3 23:46:05 2013 <8000  250062 c5ed0b711c3ea495:2  1GY33AU9yti1VQbJfTEyR8dQwcaBSjwgpQ BET    15.00000000 WIN    105.00588000

Quote
Total of 22 bets unaccounted for.

Results: 2013-Aug-03 06:29pm (up to block 250073)

   Address  Target   Should Win |    #Bets |        Win        |   Lose  | Refunds |   BTC In   |  BTC Out   |  Refund  |   Profit  |   RTP 
----------------------------------------------------------------------------------------------------------------------------------------------
1dice9wVt   64000      0.97656 |    25980 |   23548 (0.97880) |     510 |    1922 |   26773.31 |   26332.18 |   241.57 |    441.12 |  98.352
1diceDCd2   60000      0.91553 |   201682 |  183598 (0.91512) |   17029 |    1055 |   95462.01 |   93947.00 |   160.83 |   1515.00 |  98.413
1dicegEAr   56000      0.85449 |   114638 |   97451 (0.85648) |   16330 |     857 |   93100.05 |   92175.39 |   401.54 |    924.65 |  99.007
1dicec9k7   52000      0.79346 |   121704 |   95974 (0.79374) |   24940 |     790 |   75833.03 |   73961.99 |  1188.49 |   1871.04 |  97.533
1dice9wcM   48000      0.73242 |   517536 |  379352 (0.73455) |  137087 |    1097 |  339677.67 |  331516.47 |  6173.74 |   8161.20 |  97.597
1dice97EC   32768      0.50000 |   930261 |  463496 (0.49935) |  464705 |    2060 |  804220.41 |  782523.52 |  6524.91 |  21696.89 |  97.302
1dice8EMZ   32000      0.48828 |  1454803 |  708903 (0.48802) |  743695 |    2205 |  995193.80 |  974778.24 |  3003.12 |  20415.56 |  97.949
1dice7W2A   24000      0.36621 |   350146 |  128290 (0.36721) |  221071 |     785 |  606745.60 |  597847.47 |  1014.07 |   8898.13 |  98.533
1dice7fUk   16000      0.24414 |   376208 |   91614 (0.24410) |  283699 |     895 |  431688.14 |  417272.49 |  2376.82 |  14415.64 |  96.661
1dice7EYz   12000      0.18311 |   156969 |   28615 (0.18315) |  127622 |     732 |  202893.98 |  204505.90 |  3363.65 |  -1611.92 | 100.794
1dice6YgE    8000      0.12207 |   284772 |   34783 (0.12247) |  249239 |     750 |  161002.49 |  161584.67 |   462.41 |   -582.18 | 100.362
1dice6wBx    6000      0.09155 |    71902 |    6513 (0.09136) |   64778 |     611 |   20930.67 |   21523.38 |     7.86 |   -592.71 | 102.832
1dice6GV5    4000      0.06104 |    43672 |    2683 (0.06206) |   40550 |     439 |    8279.11 |    8231.33 |    31.52 |     47.78 |  99.423
1dice6gJg    3000      0.04578 |    34862 |    1598 (0.04656) |   32726 |     538 |   11336.90 |   12149.94 |    49.53 |   -813.03 | 107.172
1dice6DPt    2000      0.03052 |   127962 |    3899 (0.03059) |  123551 |     512 |   88234.12 |   89736.09 |   250.77 |  -1501.96 | 101.702
1dice61SN    1500      0.02289 |    29585 |     674 (0.02312) |   28473 |     438 |    8192.50 |    8741.46 |    15.40 |   -548.95 | 106.701
1dice5wwE    1000      0.01526 |   198083 |    3012 (0.01527) |  194301 |     770 |   58936.85 |   54520.26 |    31.38 |   4416.59 |  92.506
1dice4J1m     512      0.00781 |    43778 |     338 (0.00787) |   42607 |     833 |    8606.78 |    7010.30 |    10.45 |   1596.48 |  81.451
1dice3jkp     256      0.00391 |    29575 |     119 (0.00409) |   28993 |     463 |    6174.43 |    8717.48 |    18.39 |  -2543.05 | 141.187
1dice37Ee     128      0.00195 |    25923 |      46 (0.00181) |   25322 |     555 |    2507.95 |    1613.53 |    57.57 |    894.41 |  64.337
1dice2zdo      64      0.00098 |    35234 |      36 (0.00104) |   34609 |     589 |    2341.19 |    1751.17 |   117.25 |    590.02 |  74.798
1dice2xkj      32      0.00049 |    39247 |      18 (0.00046) |   38745 |     484 |    1846.85 |    1931.82 |     1.68 |    -84.97 | 104.601
1dice2WmR      16      0.00024 |    30474 |       6 (0.00020) |   29957 |     511 |    1008.66 |     667.24 |    22.28 |    341.41 |  66.152
1dice2vQo       8      0.00012 |    31108 |       5 (0.00016) |   30531 |     572 |     713.84 |     434.43 |    15.85 |    279.41 |  60.858
1dice2pxm       4      0.00006 |    16311 |       2 (0.00013) |   15745 |     564 |     244.78 |     320.56 |    19.06 |    -75.77 | 130.954
1dice1Qf4       2      0.00003 |    14342 |       0 (0.00000) |   13717 |     625 |     204.57 |       0.61 |    32.12 |    203.95 |   0.301
1dice1e6p       1      0.00002 |   176730 |       4 (0.00002) |  173574 |    3152 |    2326.07 |    4486.22 |   206.48 |  -2160.15 | 192.867
----------------------------------------------------------------------------------------------------------------------------------------------
           small (bets < 4 BTC) |  5338726 | 2193313           | 3120944 |   24469 | 1000951.90 |  981844.55 |   391.41 |  19107.35 |  98.091
            big (bets >= 4 BTC) |   144761 |   61264           |   83162 |     335 | 3053523.96 | 2996436.70 | 25407.47 |  57087.26 |  98.130
----------------------------------------------------------------------------------------------------------------------------------------------
                                |  5483487 | 2254577           | 3204106 |   24804 | 4054475.87 | 3978281.25 | 25798.89 |  76194.61 |  98.121
----------------------------------------------------------------------------------------------------------------------------------------------

SD Profit before fees:      76194.61891604 BTC (1.879%)
Cumulative Fees Paid:        4769.31897500 BTC
SD Profit after fees:       71425.29994104 BTC (1.762%)
Pending Liabilities:           -0.25322361 BTC
Final SD Profit:            71425.55316465 BTC (1.762%)
Profit This Month:          -2185.90038218 BTC
----
Since Satoshi Dice started, there have been:
Blockchain Tx: 18628490  :  SatoshiDice Tx: 10066282  (54.0%)
Blockchain MB:   8208.9  :  SatoshiDice MB:   4160.2  (50.7%)





! wow
324  Economy / Services / Re: Apple iPhone Factory Unlocking - Best Prices - Fastest Service on: July 26, 2013, 02:16:25 AM
Just had my AT&T iPhone 5 unlocked thanks to wtfvanity's service.

He was more worried about the time he took to get the thing unlocked than I was. Great service, looking forward to doing business with you again!

Thanks for the review. I like it when I can get them unlocked fast and yours took the full 24. It does worry me. It's my promise and I don't like to break promises.

I removed my post about me having limited internet for a few days, I am full access and ready for unlocking needs.
325  Economy / Scam Accusations / Re: Butterflylabs Huge SCAM on: July 20, 2013, 02:00:22 PM
I put in a paypal dispute because they're not shipping singles and I'm pissed

Of course they haven't replied to the dispute or refunded me yet and have a week to do so

I emailed BFL asking them if I cancelled the dispute would I be able to keep my position in queue

This was their response:




I was half expecting them to beg me to cancel the dispute and offer to bump me up in the queue or something, instead I get them stating that they "can not comment" on it.


I'm guessing if I cancel the dispute, I won't be seeing a refund and my order and position in queue will "accidentally" get lost


Anyone think i'll retain my position in queue if I cancel the dispute?

Interesting how the order page says refunded: 1 when I haven't gotten anything back in paypal yet:



IMHO You are the lucky one to get your refund the others will cry when they get their units after they're worthless.

Take the money and forget BFL ever existed and learn something from this.

BFL can't get out of what they have created and they're playing a tricky game of optics and deadmans bluff.

Either way its up to you and this is my opinion keep the dispute and get your money before things go tits up.

I understand choose chose is not going to pop up with spell check, but really, does no one in this country know how to spell? Yeah, public schools FTW... come on BFL. Require GED's in the hiring process! Oh wait, I don't think that applies to any of them.
326  Bitcoin / Pools / Re: [53000 GH] BTC Guild - PPS/PPLNS + TxFees, Stratum, MergedMining, Private Access on: July 20, 2013, 01:57:09 PM
Yep I get a cached version of the website, last showed up at half past.  Miner seems fine though 
Just now Cached for a couple pages then linked me to a live version

Its the bad luck which bothers me though, 4 blocks found in ten shifts owch   Shocked

Yeah, 50 % luck on a shift makes you cry inside.
327  Bitcoin / Hardware / Re: Mini Rig Purchased and Hashing .... erm, so what's next??!! on: July 19, 2013, 02:43:28 PM
This sounds like a BFL shill.

Everyone knows they aren't shipping anything Smiley

He says he bought it on the secondary market. Which is possible. But, still hard to believe. Especially since you have no pictures, no hash rate proof, nothing.
328  Economy / Scam Accusations / Re: Butterflylabs Huge SCAM on: July 19, 2013, 02:18:48 PM

Not a question mark to be had.  Just a bunch of misinformation and outright lies.  Gosh, I wonder why you got the response you did? Especially after I pointed out your whacky, unrealistic "hindsight investment strategy" you seem so proud of, then where you then proceeded to throw a tantrum because you were unable to understand "all sales are final" which is plastered on nearly every page of your order process.



Josh, let me help you out a bit.  "How to Handle Online Reputation" for Small Business.  This is a good start.

Tip for July 19, 2013
Overcome Negative Publicity
Combat negative publicity with an honest and professional response. If due to a mistake or error, acknowledge it and offer to make amends. Engaging dissatisfied customers can demonstrate your commitment to delivering good service. Go a step further by using the experience to teach others how to avoid their own mistakes.

http://www.manta.com/small-business/handle-online-reputation?referid=16216

That is for real companies who have products to deliver and honest business people running the show. Not going to happen with Josh and Co.
329  Economy / Securities / Re: S.DICE - SatoshiDICE 100% Dividend-Paying Asset on MPEx on: July 18, 2013, 06:11:59 PM
...
As per the S.DICE agreement, asset owners do not have voting rights to effect operational changes, nor any rights to negotiate nor block a full buyout of the company.  Nevertheless, SatoshiDice has kept the interests of the asset holders in mind throughout this negotiation process, and has intended to treat these holders fairly, above and beyond contractual obligations.
...

Erik is an ethical business man and was very professional in his operation of SatoshiDice. Let this be an example to anyone who believes that we need regulations and the coercive power of the state in order to have commerce.

Erik, nice job this is really cool and I think that the SatoshiDICE experiment is one for the history books.


lol
330  Economy / Securities / Re: S.DICE - SatoshiDICE 100% Dividend-Paying Asset on MPEx on: July 18, 2013, 01:55:25 PM
Oh no. What will MPEx do now? They don't have anything real on their exchange now.
331  Bitcoin / Pools / Re: [53000 GH] BTC Guild - PPS/PPLNS + TxFees, Stratum, MergedMining, Private Access on: July 17, 2013, 09:09:03 PM
I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

Yes they are checked. Verification time is orders of magnitude quicker than finding the proof of work.

Expanding upon this:  A 1 GH/s miner is doing 1,000,000 Double-SHA256 hashes per second.  It will submit work every 4 seconds (assuming diff=1).  The server does *one* Double-SHA256 hash to verify the work.  Of course, the server is doing that over CPU, but even a CPU (server-grade) is capable of doing a couple million per second.

Thanks for the answer, i hoped that this was the case. Just noticed on another pool that when a large percentage of hashing was added all at once, instead of the number of blocks found during a day going up, the luck went down instead. I was just contemplating how one could make that happen and i came up with spoofing the pool.

Search the forums for a little bit. Something that has been discussed is where a miner adds a bunch of hashing power with a modified miner, and instead of submitting all shares, they just submit shares that are > than the minimum, but less than a full block. So if they add say a terahash of mining, they should be finding blocks every so often. But instead of actually submitting those shares, they withhold them.

Most pools have mechanisms in place for identifying such situations, but a lot of smaller ones or pop up alt coins ones probably haven't even considered it.
332  Economy / Scam Accusations / Re: Butterflylabs Huge SCAM on: July 17, 2013, 07:26:46 PM
The statement was that we did not refund preorders.  We did.  We are no longer taking pre-orders and we are not refunding orders that are currently in the queue, that's correct.

It was stated multiple times that all sales are final when you ordered.  What part of that were you unable to understand?  We can't be responsible for your lack of reading comprehension or ability to understand simple English sentences.  Sorry for your reading disability, perhaps next time you should get someone to explain what terms and conditions mean to you before placing and order.  Now put on your big boy pants and accept responsibility for your actions instead of whining to me why you are unable to function in normal society and you should be a special case.


Unreal

I am in disbelief that this is the way a representative of any company speaks to its customers. Is manufacturing ASIC chips really that difficult we are willing to give our money away to these people?

I think they were just the first people that talked the talk. Of course both Asicminer and Avalon beat them with chips out the door but they took tons of preorder money before anyone else felt confident enough to start. Now there are a couple of others if anyone is still giving BFL money, they are just ignorant and being led to it by their high price ad campaign.
333  Bitcoin / Pools / Re: [53000 GH] BTC Guild - PPS/PPLNS + TxFees, Stratum, MergedMining, Private Access on: July 17, 2013, 07:21:41 PM
I've got a question that i probably shouldn't ask, depending on the answer.  Tongue Proof of Work. does the pool software verify that every returned hash from the individual miners is a valid response and not just some made up number? Considering the high hash rates it seems to me that this would require quite a bit of computing power, but on the other hand it wouldn't be hard to modify a mining program to spoof the results providing a much higher appearing hash rate.

Yes they are checked. Verification time is orders of magnitude quicker than finding the proof of work.
334  Other / Beginners & Help / Re: Having trouble figuring out tx fees on: July 17, 2013, 07:10:21 PM
This link shows it better (link to tx vs the address).
https://blockchain.info/tx/f045f489dd97e8a66e4551d67b117678a558a068ce886cba1aa47b6f7eee84f0

That wasn't a fee.  It was change.  Bitcoin can't spend part of output so it needs to make change
The person making the tx had outputs worth:  0.11097293 BTC and wanted to spend 0.1 BTC.
For some asinine reason they decided they wanted to include a single satoshi (0.0000001 BTC) as a fee (not exactly sure why).
Inputs must equal outputs + fee.

However the user didn't want to spend 0.11097292 BTC they wanted to spend 0.1 BTC so the client made a tx like this

IN0: 0.02465968 BTC
IN1: 0.08631325 BTC
OUT0: 0.1 BTC   <---- amount user wanted to spend
OUT1: 0.01097292 <---- the "change" sent to another address controlled by the user.

FEE: 0.00000001 BTC

You will notice the sum of the inputs minus the sum of the outputs is 0.00000001 BTC which is the fee paid to the miner.

Think of it like you want to buy a candy bar for $1 but you only have a single $20 bill.  How large will the tx be.  Well it can't be $1 because you don't have $1.  The tx will be $20. So you send $20 to the cashier and she sends back $19 in change and puts $1 into the store's account.

In Bitcoin terms it would be like this:
IN0: $20.00    <- your single $20 bill
OUT0: $1.00   <- your payment to merchant
OUT1: $10.00  <- your change in the form of $10 bill, $5 bill and 4x $1 bills
OUT2: $5.00
OUT3: $1.00
OUT4: $1.00
OUT5: $1.00
OUT6: $1.00
FEE: $0.00

You will notice the merchant had to give you a large number of discrete outputs (smaller bills).  This is because in fiat currencies the currency can only exist is predefined forms ($1, $5, $20, $100, etc).  Bitcoin however can create a new output of any value thus in the Candy bar analogy it would be like "You hand cashier a $20 bill, she securely destroys it and prints a new $1 bill and $19 bill, she puts the $1 in the teller and hands the $19 bill back to you".

What a nice explanation.


Can I play with the ending?

Quote
"You hand cashier a $20 bill, she gives it to the government which gives her a $19 bill and a $1 bill. She keeps the $1 and gives the $19 bill back to you"

No one in the bitcoin network just makes money up, they follow the rules of the network to create the change, based on the inputs. Nothing is made up, but completely dependent on previous transactions and mined blocks.

DeathAndTaxes, thanks for being so clear on that.
335  Economy / Securities / Re: S.DICE - SatoshiDICE 100% Dividend-Paying Asset on MPEx on: July 16, 2013, 04:58:21 PM
What's the dividend outlook this month?

Do you watch dooglus's charts? Site hasn't made any money this month, so minus operating expenses if the month ended today it would carry a loss over to next month.

Where can a person view these charts?  I also noticed the huge buy today, has me interested as well.

Dooglas runs JustDice, so I usually find that thread, click 'last posts of this person' on dooglas, and browse through his posts until I find the latest charts.


https://bitcointalk.org/index.php?topic=80312.0

Go to the last page of it for the newest charts.
336  Economy / Securities / Re: S.DICE - SatoshiDICE 100% Dividend-Paying Asset on MPEx on: July 16, 2013, 03:01:12 PM
What's the dividend outlook this month?

Do you watch dooglus's charts? Site hasn't made any money this month, so minus operating expenses if the month ended today it would carry a loss over to next month.
337  Bitcoin / Bitcoin Technical Support / Re: Created a new address in bitcoin-qt, and it already contains 0,001 BTC ??? on: July 12, 2013, 07:26:41 PM

 Roll Eyes


Going to quote another recent thread. Because this is a stupid argument as well. If you can really generate that many addresses, the collision that you'll find, will be with one of your own addresses (which would be empty) And the reward of finding a block is so much higher than the probability of finding a collision and the difference between the two happening is so small that you guys really don't understand how many zeros are on these numbers and what that means.

So, I was thinking about the address generation scheme that is used for Bitcoin. Please note I did not do any math here yet to see if it is likely to happen, it's just a concept.

From what I understand, the keys are 256 bits (10^77) and there are what? 1 billion keys?

http://en.wikipedia.org/wiki/Birthday_paradox
http://en.wikipedia.org/wiki/Universally_Unique_Identifier#Random_UUID_probability_of_duplicates

1-e^(-(n^2)/2x)

EDIT:

1-e^(-(1000000000^2)/(2^256)) =
1-e^(-(10^18)/(10^77)) =
1-e^(-1/(10^59)) =
10^(-60)

Current Block Probability: ~ 10^(-16)

So, getting the block is 10^45 times more likely than a single collision. An attacker would have to hope for colliding with wallets containing trillions of times more coins than will ever have been created. But if an attacker can change the value of 'n' to 10^39 (duodecillion attempts) then he'll likely be quite profitable... but then again he'll only be colliding with his own keys.




and for good measure:

This has been discussed so many times already...

There are currently 329,993 addresses in the Bitcoin network. Say that this number of addresses are created every day for the next 140 years. That's 16,862,642,300 addresses.

The chance that at least two of those addresses collided is about 9.7x10-29, using the formula here. Calculation.

If every person on Earth makes ten addresses per second for 20 years (2x1018 total addresses), then the probability that two of these addresses collide is about 1.57x10-12.

UUIDs have 2128 possible identifiers. They are also designed to be collision-proof. Wikipedia says:

Quote
To put these numbers into perspective, one's annual risk of being hit by a meteorite is estimated to be one chance in 17 billion, that means the probability is about 0.00000000006 (6 × 10−11), equivalent to the odds of creating a few tens of trillions of UUIDs in a year and having one duplicate. In other words, only after generating 1 billion UUIDs every second for the next 100 years, the probability of creating just one duplicate would be about 50%. The probability of one duplicate would be about 50% if every person on earth owns 600 million UUIDs.

Compare this to Bitcoin's 2160 possible addresses. Bitcoin has:
1461501637330902918203684832716283019655932542976 addresses
UUIDs have:
340282366920938463463374607431768211456 identifiers

And...

Bitcoin already supports OP_HASH256 in script, so it would be trivial to increase the number of addresses if it ever became a problem.
338  Economy / Scam Accusations / Re: Butterflylabs Huge SCAM on: July 12, 2013, 07:19:12 PM
I have also ordered one because there are TOO MANY mix reviews on this site about BFL. From what I can tell, people are getting there rigs. I ordered however last month so I didn't expect to receive it for a month plus.

It would do BFL good to post on their site before you order a order date for "Pre-Orders", and the expected date shipping.

The frustration however is insane and I am totally starting to understand peoples frustration.

If you want to support the bitcoin network, you made a fair decision.

If you want to make money, get a refund now. You will never make your investment back in BTC.

If you want to get BTC as an investment because you think they will go up in value, you're better to go buy BTC and hang onto them.

Enjoy the ride.
339  Bitcoin / Bitcoin Technical Support / Re: Created a new address in bitcoin-qt, and it already contains 0,001 BTC ??? on: July 12, 2013, 07:17:22 PM
It is extremely rare. But still, not impossible. If you think this number is impossible try the probability of intelligent life on a planet; that my fellow bitcoiners is a number near infitesimal.

You, or we, have no idea of the probability of intelligent life appearing on a planet. All we can empirically quickly estimate is... about 1/10, looking at the solar system Tongue


Oh wow, now to aliens.

Here's the problem with calculating intelligent life probabilities. Sure, we can estimate how many stars there are, already been done in this thread. Life has not been found to exist outside of our solar system, period. So, what numbers are you using for your calculations for green or gray guys with huge heads?
340  Bitcoin / Bitcoin Technical Support / Re: Created a new address in bitcoin-qt, and it already contains 0,001 BTC ??? on: July 12, 2013, 06:38:27 PM

Even with trillions of addresses, there would still be no collision. 2^256 is a very big number, almost as all the atoms in the visible universe.

It's a big number but not as big as you said. 2^256 is 0.12% of the atoms in the visible universe:

click

Of course a collision is highly unlikely.

It's just as big as I said. I never said it was bigger than every atom in the observable universe. I was saying stars. Which is already a pretty big number, atoms of course is even bigger.

I wasn't replying to you.

 Shocked

Oops. I'll watch who you're chastising next time. Thought it was me lol Cheesy I even quoted the damned conversation and didn't read it. Sorry Sad
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