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1941  Local / Discussions générales et utilisation du Bitcoin / Re: Meetup bitcoin sur Paris on: September 04, 2013, 09:41:54 PM
Je vends les Eruptors à ce prix pour rencontrer quelques mineurs:)

Je t'en prendrais bien un au prochain meetup Wink

Oh j'avais raté cette phrase de LainZ! C'est impossible en terme d'organisation mais si t'en vends vraiment à 0.1BTC je vais envoyer quelqu'un par procuration Smiley (quelqu'un qui connaît bitcoin pas d'inquiétudes)
1942  Other / Beginners & Help / Re: Favorite Bitcoin Wallet on: September 04, 2013, 06:57:47 PM
Kipochi wallet is the best.

https://kipochi.com/

On the website for Kipochi, it states that ... "1 Bitcoin is currently worth 3,853.36 $. This is way to much to use for normal day to day transactions. The bitcoin currency supports transactions down to 0.00000001 Bitcoin. The Bitcoin community has decided that MilliBit or 0.001 is the most useful unit in the immediate future."

Lol wtf is wrong with them
1943  Other / Off-topic / Re: Blockchain currencies and long space travel on: September 04, 2013, 06:48:51 PM
the nodes within the ship and on earth would not be able to coordinate if they are more than 10 light minutes away
Wat?
Nodes accept themselves with a time difference up to several hours.
Even a block can have a timestamp of 2 hours before the previous one.
The funny thing will be the giga fork... Better put some checkpoints.
1944  Bitcoin / Project Development / Re: Bitcoin Wallet generation by hand on: September 04, 2013, 06:42:45 PM
@jackjack,

Yep.  So I guess that answers all this.  Its not possible to create a public key without some form of computer.

I was only talking about hashes though, you could follow this post:
Well only the public key needs to be hashed to create an address. You can safely type the public key into a computer to obtain an address.

All you need to do by hand is obtain a private key and derive the public key, NOT calculate the hash.


If you are REALLY motivated you can do it in a few days I think
1945  Bitcoin / Bitcoin Technical Support / Re: PYWallet Help - Dumping encrypted private key on: September 04, 2013, 06:35:14 PM
Indeed, I will
Once cleaned:
Quote
addr;balance
1raZJDP3KRRKK59ptGbyhfkdDLXQ1XV9V;0
1FX2NDMcX1hz8CNi5gvUhsKbSzWZwRqgXM;0
13BKTFVzLD7BR16yD5gUHVmeW5idvzQvvx;0.0001
1J3VmjcjD6JHizt9PRML6dF9ZtRoQxsBrr;0
1Ztt1QKBCucciV3dsVpGmGRoUsDJ8VtcN;0
1cb38A8y586T4agywy2pRqzyoQbTmzQ52;0
1L5KEiWUUeG4c6ewBBqUnje45VUyuriT55;0

I'm sorry but that's all I can do for you as I don't know Electrum
That tells you that importing those 7 addresses into Electrum should be enough to get all your coins
1946  Bitcoin / Project Development / Re: Bitcoin Wallet generation by hand on: September 04, 2013, 06:18:59 PM
Hashes are impossible by hand...
Wouldn't a LiveCD on an offline HDD-less PC enough?

I haven't looked at the details of the hashing algorithm used to generate the public address from the private key.  However, I don't think impossible is correct.  I mean, everything a computer does can (in principle) be simulated using a very long tape and a pencil (see universal Turing machine).

Im just saying, difficult/tedious != impossible.

You want to play with semantics?

Ok, let's play.

Let's take a human, the super-hero kind, who can:
 a/ Calculate a 32-bit operation in 10 seconds
 b/ Work from midnight to midnight everyday
 c/ Calculate a 32-bit operation without any errors

A hash takes about 5000 32-bit operations. So make it 10000 for ripemd160(sha256()).
That makes (10*10000) = 100k seconds = 38.4 hours = 1.6 day non-stop.
Possible.

Now here comes the fun.



This time we take a real human, the super smart kind.

A/ He calculates a 32-bit operation in 30 seconds (please try a 32-bit addition and tell me how much time it took)
This raises the total time to calculate one hash to 115.2 hours

B/ The guy must sleep, so he can "only" work from 8am to midnight.
This makes the total time to calculate one hash equal to 4.8 days.
Still possible.

C/ The lower brain failure rate in the best conditions is 5%. As he's super smart his is only 1%.
The probability of him finding the correct hash on one try is P = 1/2^(100000*1%) = 1/2^1000 ~ 1/10^300

D/ He starts the hashing calculation at birth and will stop at 100 years old.
This is (100*365) = 36500 days of calculation.
One try is 4.8 days, so he has 7604 tries available.
The odd of our super smart guy FINDING AT LEAST ONCE the correct hash in his entire lifetime is then:
  R = 1-Q where Q = (1-P)^7604 = ( 1 - 1/2^1000 )^7604

Basic maths gives that Q > 1 - 7604/2^1000 = 1 - 10^(-297.149) > 1 - 10^(-297)
So R < 10^(-297) < 1/2^986
Yes, R < 1/2^986



TLDR

It's easier to crack 6 different bitcoin addresses with only 6 guesses than to a human to calculate a correct bitcoin address hash in his lifetime
Yes, I call that impossible
1947  Bitcoin / Project Development / Re: Bitcoin gateway for digital content creators on: September 04, 2013, 03:16:47 PM
Seems great
Maybe the problem is that the current Bitcoin users are not fond of files monetization
1948  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANN] [MEC] Megacoin has arrived. Scrypt & Core 0.8.2+ Updates: Chinese Market on: September 04, 2013, 02:11:55 PM
well guys i've tried a couple times on linux but i'm getting errors

make -f makefile.unix
Building LevelDB ...
/bin/sh: 1: ./build_detect_platform: Permission denied
make[1]: Entering directory `/home/mobgod/megacoin-0.8.992-source/src/leveldb'
Makefile:18: build_config.mk: No such file or directory
make[1]: *** No rule to make target `build_config.mk'.  Stop.
make[1]: Leaving directory `/home/mobgod/megacoin-0.8.992-source/src/leveldb'
make: *** [leveldb/libleveldb.a] Error 2



chmod 755 src/leveldb/build_detect_platform



ya that should fix the issue
dubs i tried that no good i get this i did try that before i made the post heh
chmod 755 src/leveldb/build_detect_platform
chmod: cannot access `src/leveldb/build_detect_platform': No such file or directory

I apologize if this was already answered but I didn't want to read the other 20+ pages. I found this post when I ran into the same issue.
chmod 755 ~/megacoin/src/leveldb/build_detect_platform <---works
Thanks
1949  Other / Off-topic / Re: Anybody else experience problems with their Yahoo email account lately? on: September 04, 2013, 02:05:14 PM
And colors that forbids you to clearly see what mails are unread, and an upper limit in your number of results in your search ("if you don't find what you're looking for, be more precise" fuck you microsoft), and email lines as big as 100 pixels which forbids you to see more than 12 emails at the same time on a normal screen...
They should make everything even bigger so that we only see "Outlook", our two last mails and the search form on a 25" screen. That would be great.
I had an hotmail account before but it got force-"upgraded" to outlook. Thanks guys.

Bottom line: now the only thing my outlook account is good at is forwarding the mails it receives to my gmail account

ok, why are you still using outlook?
Work account...
1950  Other / Meta / Re: It has become an absolute joke on: September 04, 2013, 01:24:44 PM
I could do without all the colored crap turning my monitor into My Little Pony barf, but my eyes (and probably everyone elses') are trained to gloss right past text below the signature bar - so whatever.
I'd be a lot happier with sigs in general if they couldn't be formatted, aside from links.
Agreed
This is never addressed though
1951  Other / Off-topic / Re: Anybody else experience problems with their Yahoo email account lately? on: September 04, 2013, 01:15:18 PM
And colors that forbids you to clearly see what mails are unread, and an upper limit in your number of results in your search ("if you don't find what you're looking for, be more precise" fuck you microsoft), and email lines as big as 100 pixels which forbids you to see more than 12 emails at the same time on a normal screen...
They should make everything even bigger so that we only see "Outlook", our two last mails and the search form on a 25" screen. That would be great.
I had an hotmail account before but it got force-"upgraded" to outlook. Thanks guys.

Bottom line: now the only thing my outlook account is good at is forwarding the mails it receives to my gmail account
1952  Economy / Services / Re: Website Preview: BITADS.NET. Now Pay-Per-Day! on: September 04, 2013, 01:00:22 PM
As the topic is back about bitads.net:

Will you ever let people put adspaces on something else than websites?

What did you have in mind? Like Mobile apps?


More like plugins
Having that in apps would be cool though
1953  Bitcoin / Bitcoin Technical Support / Re: Strange Transaction to Localbitcoin Wallet on: September 04, 2013, 12:51:43 PM
2 I think
1954  Bitcoin / Bitcoin Technical Support / Re: Vanity Address Bounty 0.1 BTC on: September 04, 2013, 12:07:10 PM
You can use your own partial private keys
It's 100% secure

Create your own private key, calculate the corresponding public key, then put that public key in the "Your-Part-Public-Key:" form
You'll see that "Your-Part-Private-Key:" will disappear
1955  Bitcoin / Bitcoin Technical Support / Re: Vanity Address Bounty 0.1 BTC on: September 04, 2013, 11:49:57 AM
https://bitcoinvanity.appspot.com/
1956  Other / Off-topic / Re: Google Authenticator problem on: September 04, 2013, 11:35:23 AM
https://bitcointalk.org/index.php?topic=287459.msg3078798#msg3078798
1957  Bitcoin / Development & Technical Discussion / Re: [Choose the new Pywallet name] - Pywallet 2.1.0: manage your wallet on: September 04, 2013, 11:23:15 AM
I don't see what can happen
If the passphrase is bad or if pywallet incorrectly imported the private key, bitcoin-qt will say "corrupt wallet"
But if it doesn't say that and if you rescanned I don't see where could be the problem
Could you post a screenshot of the error?
What does the debug.log say?

Ok - job done but what actually worked was this -

I deleted the wallet.dat and let bitcoin-qt make a new one

I imported the key with pywallet and turned pywallet off

I ran bitcoin-qt -rescan this time - didn't do that last time thanks for reminding me.

After the rescan it came up with the paper wallet balance and I sent the BTC.

I turned off bitcoin-qt and zipped the wallet with crypto and restored the original wallet.

This is a workaround...

I'm glad it worked out!
The new version will allow to create transactions by hand
1958  Other / Off-topic / Re: List of alt accounts on: September 04, 2013, 11:12:28 AM
Alts of who?
You should use the quote tag instead of the code one so that we can click on links
1959  Other / Off-topic / Re: Anybody else experience problems with their Yahoo email account lately? on: September 04, 2013, 11:07:54 AM
outlook > * > gmail > yahoo
kthxbai

outlook = hotmail
i bet you don't even have a @msn.com email

Nope, outlook is even more shittier
1960  Bitcoin / Development & Technical Discussion / Re: x^3+7=0 ? on: September 04, 2013, 11:06:44 AM
It shouldn't be too difficult to compute the cubic-root modulo p. There are at most three solution, but I'm not sure if there are always three solutions.

The idea for square root is the following.  For every number x^p = x (mod p), hence x^(p+1) = x^2 (mod p), hence x^((p+1)/2) = x (mod p) and x^((p+1)/4) = sqrt(x) (mod p) is one of the two square roots.  The other is obtained by negation.

For cubic roots a similar approach should work.  If (p+1) is divisible by three then x^(p+1)/6 is a cubic root (I'm too lazy to check if this is the case).  There should be a general way to find a cubic root for any prime p.



I tried yesterday but no, p is not divisible by three
It's divisible by 2, 4, 8, 16 then big numbers (>1M)
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