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1  Bitcoin / Development & Technical Discussion / Re: 4 hashes parallel on SSE2 CPUs for 0.3.6 on: August 01, 2010, 12:53:40 PM
that's what it is supposed to do, but it doesn't always do it, issues are on gcc bugzilla

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43798
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
2  Bitcoin / Development & Technical Discussion / Re: 4 hashes parallel on SSE2 CPUs for 0.3.6 on: July 31, 2010, 11:30:11 PM
care with __attribute__ ((aligned (16))) , it doesn't work with local variable, gcc doesn't align the stack
3  Bitcoin / Bitcoin Technical Support / Re: md5? on: July 18, 2010, 09:33:47 PM
md5 is evil, two differents files can have the same md5 checksum (http://www.coresecurity.com/content/md5-harmful)
but unfortunately people still use it ;(
4  Bitcoin / Bitcoin Technical Support / Re: md5? on: July 18, 2010, 08:52:19 PM
md5 checksums are still widely used but not secure
5  Bitcoin / Bitcoin Discussion / Bandwidth on: July 14, 2010, 01:57:00 PM
what would be the bandwidth needed per peer if there was 100 000 transactions between each block generation please?

a block is generated every ~10min, so all peers must get the 100 000 transactions in less than 10minutes ?

if each transaction is ~1ko, that mean 100Mo every 10min, ~165ko/s ? isn't it a bit much ?
6  Bitcoin / Bitcoin Discussion / Re: Block vs Transaction vs Coin on: July 13, 2010, 01:10:08 PM
what happen if millions of transactions occurs during the block generation, would be block size huge ?
7  Bitcoin / Bitcoin Discussion / Re: Flood attack 0.00000001 BC on: July 12, 2010, 03:40:04 PM
so the fee must be the same for all nodes isn't it ?

do the nodes reject other nodes that doesn't apply the same fee?

if not, there is no way to wait/find a node that apply a lower fee?
8  Bitcoin / Bitcoin Discussion / Re: Flood attack 0.00000001 BC on: July 12, 2010, 03:05:44 PM
if i send many 0.00000001 BC using a friend node that take no fee (or that send fee back to me).

Will the friend node spead all the transactions over the network?
9  Bitcoin / Bitcoin Discussion / Re: Getting started on: July 12, 2010, 12:12:57 PM
First time i launched bitcoin i couldn't receive anything and hard drive ran intensively for hours.

I thinked it was buggy but it's not, bitcoin have to get all the known blocks (around 65500 for the moment).

So if you have the same "problem" don't worry all is ok, you just have to wait.
10  Bitcoin / Bitcoin Discussion / Flood attack 0.00000001 BC on: July 12, 2010, 12:04:24 PM
hi, what would happen if someone sends millions of 0.00000001 BC to millions of address please ?

=> all of the networks peers must store all transactions ?
=> are each 0.00000001 owner/hash stocked in blocks on all peers?

i don't really understand how bitcoin handle fractions of bc
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