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4961  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 03:19:45 PM
Because it wouldn't do the trick just the same.  If they are sending transactions just a few blocks apart, then 5 BTC wouldn't be able to be sent without a fee.  Remember that a fee is required whenever Bitcoin * Days is less than 1.  30 minutes * 300 BTC = 6.25 Bitcoin Days, but 30 minutes * 5 BTC = 0.104 Bitcoin Days.

So would 50 BTC be able to be used to do the same thing then?

Its not spamming if they are paying fees Smiley

No fees are being paid (check the links to blockchain,info).
4962  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 03:10:23 PM
EC math is magic.  Smiley

You don't really embed the secret number, you provide the product of the random number * G.  You may recognize that as the same operation that produces your public keys from your private keys.

Oh - well I must admit that to me it is a bit magic - but from what you're saying then the random number being not actually embedded at all would make it pretty useless for storing information then.

In that case we can rule out the "storing information" hypothesis - any other ideas why this spamming is being done (to prove some point perhaps)?
4963  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 02:58:58 PM
The free TX policy has a coin days destroyed. For example, sending 100 BTC around would allow you to get free TX 100x faster than sending 1 BTC around.

Aha - I thought something like that might be the reason - so does the figure of 300 BTC have any "magical property" in regards that it seemingly can get into every new block (despite the UTXO being no older than the last block)?

If they used 100 BTC instead would that not work just as well?
4964  Bitcoin / Bitcoin Discussion / Re: A block with only a single transaction? on: July 10, 2013, 02:28:21 PM
The only concern with single tx blocks would be if they were a part of a huge >50% attack where *all* new blocks appearing had only the "coinbase" tx (as this would stop other tx's from getting processed).
4965  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 02:14:04 PM
Why are they using a large amount of coins for this purpose?  Couldn't they just transfer 1 coin back and forth and acheive the same result?

A good question - does it have something to do with the minimum tx fee algo or maybe the spammer is just "showing off" how much BTC they have?
4966  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 02:04:37 PM
No, the random number is a secret. You can't use it to store information. Revealing the random number will also reveal the private key. http://en.wikipedia.org/wiki/Elliptic_Curve_DSA#Signature_generation_algorithm

Huh - exactly how do you embed a "secret" number when ECDSA just does signing (it does not do encryption)?
4967  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 01:46:17 PM
When signing with ECDSA you need to include a random number, which makes the signature different.

Okay - so random number rather than timestamp - the point is you *can* embed information then (and if random number then easier probably as perhaps if it was a timestamp it might be checked for range).

Of course I assume it is not that big so not much information can be sent with such an approach (yes - too lazy to check the exact details as I don't think it matters very much - if the wish is to send messages then Bitmessage would be a much better option).
4968  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 01:37:17 PM
If the sender was to pay a fee he would probably refrain from this behavior

Of course - so the question is whether there something wrong with current fee rules that are permitting this?
4969  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 01:29:35 PM
There is no timestamp in transaction

So what is the thing that makes an identical tx different each time you sign it (I have tested this so I know it to be a fact)?
4970  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 01:27:09 PM
Curious as to why they would use 300 BTC for an experiment when 5 would do the trick just the same...

It certainly is a lot of BTC to be doing this with - am guessing the owner must have quite a lot of BTC to spare.
4971  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 01:21:43 PM
Why don't they just use BitMessage?

Indeed - if wanting to send information that would make a lot more sense - perhaps it is just an experiment (although using 300 BTC for such fun could be rather expensive if something goes wrong).
4972  Other / Beginners & Help / Re: GST and Tax issues for Bitcoins in Australia on: July 10, 2013, 01:19:59 PM
Does GST apply to gold or other PMs?

I think that Bitcoin being a "virtual commodity" (if not considered a currency) would probably be closest to those commodities.

Of course as has been stated - a "ruling" can be applied for from the ATO which might help clarify the situation.
4973  Alternate cryptocurrencies / Altcoin Discussion / Re: ripple question on: July 10, 2013, 01:14:13 PM
why don't exchanges trade xrp?

Isn't Bitstamp effectively doing just this (although the actual trading is done *through* Ripple)?
4974  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 12:53:45 PM
How do I do this. I want to store my backups with the blockchain.

Hmm... at a rate of a few bytes per 10 minutes (assuming one tx per block which this spammer isn't even achieving btw) I would guess you would not want to be backing up anything very big (unless you are willing to wait years for your backup to complete).
4975  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 12:17:48 PM
Which would make sense, if the sender had some control over the timestamps.

I assume timestamps is referring to what is stored in a tx itself (not the block timestamp as that is provided by the miner).

Note that if you sign the same raw tx multiple times (by repeating the sign command) you end up with a different signed raw tx each time - this is due to a timestamp field in each tx (AFAIA).
4976  Other / Beginners & Help / Re: GST and Tax issues for Bitcoins in Australia on: July 10, 2013, 12:12:09 PM
Providing bitcoins is not a service.

Indeed GST makes little sense to be applied to bitcoins themselves but makes perfect sense for things like DNS registration or VPS/VPN.
4977  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 12:08:28 PM
It matches the free transaction criteria.

Either someone is bored and wrote a script to keep sending the coins back and forth, or it's passing data. I think the latter is more likely.

I wonder whether the free tx criteria is too lenient (it could become quite a problem if we end up with 100s or even 1000s of bots doing the same thing).

The possibility of it being a (rather slow) method of sending data (via the timestamp part of the tx) does indeed make some sense - the address that I linked to is constant (it keeps being sent out from and back to that address) so that is also interesting as it may well be possible to work out *who* it is that is doing this.

Of course it is always possible that the computer that this bot is running on might crash and burn with the 300 BTC being lost forever. Grin
4978  Bitcoin / Bitcoin Discussion / Re: Someone is spamming the blockchain on: July 10, 2013, 05:46:29 AM
I think it's clearer from this address: https://blockchain.info/address/15Z4XmorKSN51ndyPrZ2EtL7Nnksb88888 you can see that each tx is between 1 and 3 blocks after the previous tx.

It is a little surprising that these tx's are being mined without fee (although that is of course up to miners), however as they only each have the one UTXO they are all very small and of course the amount isn't considered as "dust" (maybe it's some sort of a protest?).
4979  Bitcoin / Project Development / Re: [ANN] CIYAM Open - Sign up now - over 25 BTC still unbid for on Moneychanger! on: July 10, 2013, 04:08:09 AM
Progress towards the new website design

We now have an image of what the new design will look like:

http://ciyam.org/docs/home_page_design_h.png

the next step is to get it coded into HTML/CSS and then making the necessary changes to the FCGI UI.

Hopefully it should be completed before the end of August - I have also recently made some changes to the session handling code (you may need to force a browser refresh) that should reduce the incidence of "session timeouts" as well as "Invalid URL" errors.
4980  Bitcoin / Project Development / Re: Holy Grail BOUNTY on: July 10, 2013, 03:27:12 AM
How can I donate to Xenland?

Xenland has his own project listed on CIYAM Open (http://ciyam.org/open/?cmd=view&data=20121222131254938000&ident=M100V137&chksum=24be696c) which has a general donation address or otherwise you could donate specifically to the GUI task for Moneychanger that he is currently working on: http://ciyam.org/open/?cmd=view&data=20130607042814077000&ident=M100V131&chksum=9e58a546.
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