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581  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 09:42:13 AM
Quote
People still trust Mt.Gox, and they rewrote a good amount of history
Mt.Gox didn't rewrote any of the bitcoin history, they have only rewrote their database, there is a big difference Wink

Yep that is true. There is a lot of "misinfo" out in the community about what is an attack, what has happened in the past, etc. It's a complicated subject and doesn't make for easy reading.

That said all existing p2p crypto currencies suffer from the >51% malicious attacker. Until some smart minds solve it , it is something we all need to be wary of and keep an eye on, such as not supporting large pools with great shares of mining power. Easier said than done though I guess. You only need ~15 million (less if you're buying in bulk I guess) to own the bitcoin network with GPUs. And if you have that kind of money to do an attack you probably can also start fabricating your own SHA256 machines which run on minimal power.

Food for thought.
582  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 08:13:57 AM
I don't think you got my point. Let me lay it out for you.

Bitcoins: 51% attack => Make some money from cheating mtgox => Keep doing it and MtGox can't function and stops withdrawal and bitcoin dies. You can't make a lot of money, so no monetary incentive to do 51% attack.
Solidcoins: 51% attack => Mint a lot of solidcoins for yourself => Stop doing it and solidcoin recovers. => Convert those coins you minted for Bitcoin/USD. You can make a lot of money, so there is monetary incentive for 51% attack.

No I get you you're just overstating the impact here.

If someone did start messing with timestamps/speed/etc it would be detectable. It's not like a ninja attack in the night. It's the same with any >51% attack, they are very visible and you need to take advantage of them quickly before people realize. In both instances confidence in the network will be shattered.
583  Alternate cryptocurrencies / Altcoin Discussion / Re: Coinotron - Automated switching to the most profitable currency on: August 31, 2011, 08:07:26 AM
Haha yes that would be excellent. Instead of letting them hoard SolidCoins sell them immediately to get BTC back. I'm sure doublec or moon will help you out with this Smiley
584  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 08:00:14 AM
So I take that back about bitcoin not being dead with a 51% attack. With 51% and malicious, you can hurt bitcoin, and the whole bitcoin economy. You can effectively kill the bitcoin economy by not accepting any transactions into your blocks and not accepting blocks found by other miners. But you still cannot "write the chain pretty much however you like." You cannot spend money that doesn't belong to you. And you cannot earn more coins than you would otherwise.

It's actually irrelevant about not being able to spend others coins, because you can continue to spend your own, you simply give the vendor the amount of confs they want, then take the chain back to a point in time before the TX and rewrite history. Because no one is going to beat your length there is nothing they can do about your rewritten history. The higher over 50% you are the quicker you can repeat this process. ie MtGox would be cleaned out or would be forced to shutdown, freezing the entire economy. Bitcoin dies.

On the other hand with solidcoins, you can benefit yourself and not kill off solidcoin by performing a 51% attack. Sure the solidcoin economy will take a hit (mtgox/mybitcoin level hit), but it will likely recover. And the attacker would have created hundreds of thousands of solidcoins for himself during that attack and no one could do anything about it.

Yes you could manipulate the speed of the network to increase coins. But it's kinda irrelevant when you can just spend whatever you want over and over again. Either way there is utter chaos and doesn't end well for the chain. In both instances the malicious team have to work fast to get wealth out of the system before it is noticed, so in both instances it will be very obvious something is happening.

It is why I don't understand why people support pools like SCguild or deepbit when they are too powerful for their respective networks. SCGuild at least will be moved down soon as other large pools join but it's just as likely deepbit will do the same to SC as it is now to BTC.
585  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 05:56:36 AM
At 51%, bitcoin will not be dead. They can just do some double spending and maybe reverse some transactions. They can create near infinite amount of coins. But solidcoin would be dead, because they can create near infinite amount of coins for themselves.

A little education doesn't go astray Smiley . At 51% you are guaranteed to be able to always produce the longest chain and hence you can not just "do a few double spends" you can write the chain pretty much however you like. So yes, bitcoin would be dead because that "group" would effectively devalue the entirely currency as they plundered it. Mtgox would be bankrupt in a few hours/days. No business could any longer trust transactions unless there were massive amounts of confirmations, likely reaching days (even then they are still vulnerable).

>51% and malicious = death. Bitcoin isn't designed to protect against it, and one of the only known ways is centralization.
586  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 05:52:02 AM
So when difficulty will be changed ?

About 4-6 hours.
587  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 05:49:58 AM
If you have a look at the code, you would understand everything what 400% means. Actually, CoinHunter is just promoting for solidcoin. I think CoinHunter is also an excellent programmer through the thread. Apart from that, I can't see some other excellent points.

P.S. "400%" is not invented by SolidCoin. Everyone can see this "400%" is there in Bitcoin. What CoinHunter did was that he promoted it as a special feature belonging to SolidCoin.

Yes Bitcoin has a 4x limit on increasing or decreasing. However it is far too long, every 2016 blocks. Bitcoin also desires a "magic number" for it's blocks, and that is 10 minutes. SolidCoin on the other hand tries to stay _UNDER_ 3 minutes. To reduce variance and provide a fast network. As such the people thinking "coin generation goes too fast" are kinda missing the point, it is supposed to go fast, it isn't supposed to always be at 3 minutes and if the system is "gamed" by a miner or two to provide "artificially" higher speeds then that is also "ok".

However I also stress network balance is very important and having SCGuild so powerful on the network (like deepbit is on btc) isn't good, so I'll be looking at ways to solve this going forward, even though I think the current situation will resolve itself soon.
588  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 05:44:21 AM
I talked to ArtForz on IRC and he explained this 51% attack to me. This attack is only possible with this retargeting algorithm introduced in SolidCoin. So it doesn't affect Bitcoin. The gist of it is that you fork the block chain and keep finding blocks on your own without reporting them. You fake the timestamps to make it seem like it took 4 times as long to find blocks. After this period of 240 blocks, the difficulty will be reduced to 25% of what it was. Since the difficulty can only climb by 11% each time, you can do 13 fast periods before the difficulty is back to where it was. Then you introduce this blockchain to the rest of the network. Since you were hashing at >51%, your block chain will be the longest and will be accepted by everyone. ArtForz calculated that you can make ~3.5 times the number of coins that would normally get. The effect can also be compounded. So if you do 2 slow periods and reduce the difficulty by %25^2 (or 6.25%), you can make about 3.5^2 (~12.25) times more coins.

While 51% attacks are not likely, they are still a possibility. Especially when the reward can be so huge. If you just do 4 slow periods, you get 150 times the normal output.

Well he is right that it introduces some more "fun" you can have with a chain at 51%, the point is if you're at 51% it's not healthy regardless whether you're on SC or BTC.

At 51% and having a malicious attacker both chains are dead. Discussing the new ways you could die is kinda irrelevant. Do you understand what I'm saying?
589  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 04:56:33 AM
It can drop by a factor of 4 at maximum, so anything up to 12 minute block average is under the 4x limit.

At the moment blocks are averaging perhaps 6-8 minutes. Still under BTC confirmations even though we've dropped 900GH which is why SolidCoin is the fastest currency. So we should see a drop down to about 9000, give or take. We are 43 blocks away from this retarget period actually... not very long at all.
590  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 03:52:40 AM
Let's assume we lose almost all the rest of the miners. What's the longest time that can pass until the next difficulty adjustment?

We can't really have a discussion unless you give actual numbers. The longest time it can take is infinite, with 0 miners. Smiley Don't know if that really answers your question or not.

We're about to see a drop back down to 8000 diff or so in 6 hours, down from 18000. So we will likely see more miners coming back and the cycle continues. Notice however that we now have a new minimum amount of miners (compared to starting with 0 ) Smiley This is part of the algorithm. Each cycle the base should continue to grow.
591  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 02:21:19 AM
Actually with my current website, it will take me ALOT of work so that is a blunt statment. I don't know of any exchange that will directly take USD for SC or vice versa, I'm forced to program fluctuating SC exchange rate with the already fluxuating exchange rate..... on top of that I have a "Locked in BTC price" so its even more of a hassel. That is why I'm going to sit on the side till SC gets its stuff together.

Yep all good points. It depends of course on a variety of factors, but regardless of what the "value" is, switching to SolidCoin is really painless for most sites. Obviously determining "value" is an importing thing for any business and will definitely restrict uptake.

So we need to improve the developer tools and make it easy for businesses used to dealing in fiat to have that option. Unlike bitcoin we aren't going to force users to rely on middlemen who go to the exchanges for you and take fees and then give you fiat after a complicated and unneeded signing up procedure. We are working closely with some exchanges to offer this straight to the business and give them the code to use it.

Even with Bitcoin's "value" in 50% swings in some days businesses can't rely on it. So for a while at least we have to peg value to fiat and keep their holdings in fiat until the day the currency is stable.
592  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 01:41:34 AM
Dude, do you permanently reside in nerdland?  And when I said buy stuff, I meant good stuff.

Ok so now we're getting down to the meat of your debating talents, that when I reply to your incorrect statements you change them to subjective ones.

"I didn't mean buy stuff, I meant buy stuff that I like from the shop I like"

Normal businessmen do not consider accepting SolidCoin, let alone Bitcoin, easy.

That's what I'm going to change. You excited? You should be.
593  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 01:38:37 AM
Okay then, sorry for any misunderstanding. I do believe that solidcoin is an improvement over bitcoin most definitely, but that is the same thing with namecoin, yet people have not "fleeced" there from bitcoin.

Artforz has "suggested" code be put into i0coin which was designed to ensure his FPGA miners got more of the blocks than others. Someone incompetent then added the code. So this is what I mean by fleece, he has willfully decided to fleece BTC from the ignorant people who don't understand it. Perhaps people think that he's a champion for using his intelligence in such a manner but to me it comes across as deceitful.

The other BTC trolls here taking joy in the potential misery of others is also quite a sad indictment on the human race.
594  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 01:33:46 AM
What we do know is that in under a week we have gone from 1.2 THash, or 11% of the BTC network to 300GHash and SolidCoin is still flying.
You don't understand that loosing over 80% of your miners in a matter of days as indicative of a larger problem? The SC network is already down to 200G. A little more and a single miner like ArtForz could wipe out your chain. Hell, in a couple days I might be able to. I better dump my SC asap.
* Syke goes off to start compiling a custom SC node...

Firstly no it's not really a problem LOSING 80% of the network hash, it's a good test of how resilient the code is. Without that happening I won't be able to point to it in the future as evidence. It's an issue all new chains will face gaining support from miners. They come and go when it's "immediately profitable" or "immediately not profitable".

I also don't think it's wise to publicly out yourself as a troll but nevertheless I can't stop you. Smiley
595  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 01:29:44 AM
Dude.  You're incredibly dense.  Right now, it doesn't matter how good SC theory is.  Bitcoin is still better in virtually every way because you can BUY STUFF WITH IT.

Hey dude you can buy stuff with SolidCoin too!

And BTW, vendors only need to take 5 minutes switching to SolidCoin, it's not hard. One of the advantages of me still supporting the archaic bitcoin API.
596  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 12:53:33 AM
They don't even have to turn off mining
1. Pull a mining cartel attack and fork the chain when another miner finds a block.
2. Start fucking with block timestamps.
3. Huh.
4. Near-infinite number of blocks!

Similar things are possible with BTC so not sure of the relevance to only SC? Things need to be done to ensure network balance, both SC and BTC are powerless in that regard. Howeer like I said SCGuild is concerned with such things and I'm sure he would realize he would face consequences if he attacked peoples investments. Other pools, who knows, there has been open talk from people like LukeJR (elegius owner) to run malicious attacks on IXCoin. So obviously this kind of behaviour isn't unheard of when it comes to pools.
597  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 12:46:49 AM
Too late. SCGuild already has way more than 51% power. All they would have to do is turn off hashing for one day, difficulty will plummet, then we can get back to getting several blocks a minute.

SCGuild, what do you say? Will you turn off the pool for a day?

It's not actually too big a problem if they do that, faster blocks is fine. SolidCoin is only a week and a half old, once it starts gaining more traction due to my development changes there will be more stability in the mining power. What we do know is that in under a week we have gone from 1.2 THash, or 11% of the BTC network to 300GHash and SolidCoin is still flying. BTC would be dead, as we saw with NMC, Ixcoin and I0coin.

So yes SC may not be "perfect" in every way but those trying to suggest it's not better than BTC are living in lala land.


598  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 12:44:22 AM
CoinHunter, with all due respect, I think this post is perhaps a little overstated. Bitcoin has itself been very vulernable to security (see: trojans, theft, etc.), but the changes made in solidcoin I feel have not remedied this. The GUI settings are still in wallet.dat in solidcoin, aren't they? And solidcoin also does not yet have accessible wallet backup.

That is correct. Firstly I didn't expect quite the amount of success SolidCoin has had to this point, I thought I would have more time to fix such things. However it was also important to start testing my network protocol changes in a "Live environment". As can be seen with the data available, SolidCoin is the fastest and most reliable cryptocurrency network out there.

I am working on fixing this issue with the wallet.dat storing unneeded junk, and also automatically backing up wallets, along with multiwallet support for businesses and users.

Calling the bitcoin devs "trolls" is not appropriate. I suggest you renege on this post, and return to the attitude you had when you first released solidcoin: saying things like "Solidcoin will by next to Bitcoin as silver is to gold" instead of "Bitcoin is programmed by 12-year-old idiots and I am laughing at them".

Well I am laughing at the code more than "them", as a serious programmer that is the joy I get in life. Wink But if people want to actually DEFEND the code, especially when they are ignorant, then of course I will show them examples of the poorly written and designed code they seem to be supporting. At least I am trying to do something about it, whereas people like artforz just "agree" with me, do nothing to the code because they'd rather spend their time fleecing BTC from people supporting new coin chains.
599  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 31, 2011, 12:36:43 AM
BTW, have you figured out the tiny problem that SCs (and i0s, and soon IXs) difficulty adjustment algo creates when faced with a attacker with majority hashpower yet?

Sure, but the goal is never to be in the situation where someone has 51% power, worrying about "attacks" that happen in that scenario when you can fork the chain is kinda irrelevant no? Better than doing a namecoin/i0/ixcoin and dying, thus leaving an "80 million dollar economy" in shambles. Obviously with deepbit on BTC and SCGuild with SC it is a concern, however the SCGuild owner seems honest.

I'm trying to solve some of these bigger issues, so we will see what I can produce.
600  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANNOUNCE] SolidCoin - new and improved block chain. Secure from pools on: August 30, 2011, 11:37:44 PM
Yeah, unit tests, test suites, ... who needs that shit for a network handling $M of transactions daily? Just focus on adding features to the GUI! *facepalm*

If you had ever looked at the ugly state the Bitcoin code is in (and the inherent issues in it) you wouldn't be thinking it's fit enough to run millions of dollars worth of transactions a day. It's like someone turned in a highschool assignment and everyone else went "well that works" and off they went. I mean, which "designer" decided to start dumping GUI and other settings in wallet.dat ? Do they know there is a .conf file for this? Where is at least some attempt at backing up wallet.dat's which are worth tens of thousands? Is it really the mantra that if the power goes off and your wallet.dat was being written to that it's your fault for not running some sort of sophisticated backup system for it? Is it that hard to always have a backup file there (a single copy command) ? These type of things are standard for bulletproof applications that customers have to use, anyone with experience in the industry would see it in a second. This is only the tip of the iceberg.

I have to laugh at the trolls who can't program and don't understand how awful the situation is for BTC at the moment. Satoshi had some great ideas, but he wasn't a good programmer, and since he left barely anything has been done with the code. The client has stagnated, badly and nearly no one wants to touch it. So keep the false worship up and let's see how deep people like you can keep digging the Bitcoin hole.
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