Topic: Cheaters (double spenders) and what the gambling sites are doing against them (Read 2985 times)

So someone can use 1ntc and play till they win big ? Has this happened ? How much habe people gotten away with ? Its very interesting but it sounds like people would clean you out so how did you stop that from happening ? Surely the cheater can't use this over and over untill he is happy with his profits ? Or can he ?

Nowadays, bitcoins confirmations takes a lot of time to confirm not only 2-3 minutes (most of time) ,but 1 confirmation policy is a must for every casino.

In your case they will need to do a lot of home work so is not it better to just keep 1 confirmation for the deposit to the site and nowadays it do not take much time for the first confirmation to happen. It only take a few seconds and sometimes a minute or two.

Seems like the current state of bitcoin has made most sites abandon their 0 confirmation policy. LuckyBit was the site I thought would keep this for the longest but a while ago they had to move into 1 confirmation policy too atleast temporarily until some kind of a solution was found. I think Satoshibones still accepts these so maybe reaching out to them would be an option.

In that situation 0 confirmation is just a window for the cheaters to play for free. before reading your this post I was wonder that why the gambling sites are against the 0 confirmation and do not pay the winning of transacted bitcoins with 0 confirmation. For the security of everyone it is beneficial that everyone adopt 1 confirmation policy.

Would love to hear from other gaming websites regarding this issue!
Happy Holidays everyone

I think the only way to make sure people can't cheat is to require 1 confirmation on deposits.  It sucks as a player, but if the site has an account for the players it isn't so bad.  You can deposit a larger amount, and you will only have to wait for that first confirmation, but you can play many rolls/hands off of that one deposit.

I used to play a fun Pachinko style game that was obviously took 0 confirmation bets because the ball would drop as soon as you sent the transaction.  The site was really fun, but it hasn't been up in a long time.  I'm sure that cheaters were taking advantage of 0 confirmation bets and just double spending their losing bets.

That solution doesnt work because they arnt double spending if they win. If they win they just let it go through. They only double spend
when they lost it all so basically they dont lose the btc they sent.  I would just make people wait and get the 1 conformation to be safe

Nothing ias wrong with 0 deposit. It helps speed it up to get players playing soon as they can. You can't double spend anymore.
If it is a problem the solution will be easy. Just make no withdraw until deposit is going through. Also if so many transactions fail then flag the account.

I thought they fixed the double spending problem. You speak about not like its as easy as turning a light switch on when its not. Its very difficult if not impossible to do these days. They increased sexurity on the blockchain because people were having double spend problems as well.

OMG now day how all hacker and user try to find way to trick the website to get bitcoin ..in anyway they can ..so this i quite good finding ..hope like this new trick will be found and taken action to stop it

they just ask people for confirmations when they make a deposit because i doubt it is possible to cheat with the deposits though that is just my thoughts

It was happening for us nearly every day. These cheaters are professionals that do this for a living.

Hi, new member here, but not new to btc casinos.

I remember one time playing at mbitcasino 1 of my deposits for .5 btc got double spent and I have no idea how. I had no clue it got double spent as I lost the entire deposit. Months later, after many more deposits I finally won but they would not let me cashout.  When I contacted support they said a deposit from months ago was "double spent" and never went through.

They wanted the .5 btc taken out of my current winnings because some deposit from over a month ago supposedly got double spent and never went through. I was pissed to say the least, especially since I've deposited 20+ BTC over the past year or so, without incident.

It literally took 1 month to straighten out and in the end they did not make me repay the .5 btc. To be fair, they even credited my account .5 btc without playthrough for the hassle.

I did not do the double spend and they a knowledge that. Has anyone ever heard of anything like this before? I mean, the supposed double spend deposit they never received was played and lost.  They continued to allow me to deposit and lose and the 1 supposed double spend only came to attention when I tried cashing out.

This might be a little confusing. If so I can provide corresponding emails I had with mbit at the time...

As a player, I understand the need for at least one confirmation.
As a Mod on a dice site, I often see people wonder why their deposit takes so long. Especially when it takes a long time to find the next block.
Unfortunately, there is nothing to do about this, other than using a faster altcoin or changing the fundamentals of Bitcoin. Both aren't really an option.

Don't forget that Sathoshi's original recommendation is to wait for 6 confirmations before you can fully trust the transaction. One confirmation is already moving far towards a better user experience instead of full security. I know at least one exchange that requires 6 confirmations before you can trade.

It seems you don't really understand what people are actually discussing about. The problem isn't withdrawing a double spent deposit, but rather people depositing money that can be easily double spent, gambling with it a risky way (like going 2x with his entire balance). If the bet wins, then he will let the deposit confirm and not double spend it. If he loses, he double spends the transaction and even though he lost money, he didn't actually lose it because he changed the transaction, and the gambling site owner gains nothing, but has a chance to lose money.

I didn't look for it yet, since I was on my phone and it's hard to look for stuff on the mobile version. It is a serious thing for gambling site owners. Sure, it might not be done everyday, but one person could do a deposit with 1 bitcoin, double spend if he loses, but he could try bets like 10x, which would allow the casino owner a chance to lose 9 bitcoin with a very low chance for reward (the double spend fails). Even if it's done once every week, it still hurts.

Well i think better way to deal out is to stop the withdrawal or payout(onchain) until the deposit by a user/player gets 1 confirmation or further more confirmations that a site owner is suitable with.Also same should be with account balance transfer.Most of the sites uses that to prevent loss of double -spending

there is nothing to find it is literary on the first page of blockchain.info
https://blockchain.info/double-spends

and i gotta say this is not a serious thing, nor a common thing that happens. look at this page and look at the dates and times the newest one is from yesterday. so it is not like people are double spending thousands of tx!!

also i should add that from all that list not all are fraud. there are times where you double spend to include more fees for your tx to get confirmed.

p.s. this is avoidable easily with 1 confirmation requirement.

Umm, pretty recently? Double spending happens every day, and most people don't really look into it. Why bother anyway? Blockchain.info has a list of all double or triple spent transactions, I will see if I can find it. Double spending is definitely possible and even if it happens infrequently, it must suck for the gambling site owner to have to pay out a win that could have easily been double spent if he lost.

Double spending is so very difficult to do, if at all. I wouldn't even be worried about it. I mean when's the last time this has even happened ? I haven't heard of double spending forma very long time.