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Topic: Is PrimeDice really (provably)fair? (Read 32382 times)

legendary
Activity: 2940
Merit: 1330
September 29, 2014, 05:43:43 PM
PD is definitely  a scam.  It wouldn't exist if it wasn't.......  I know for a fact the owners track peoples IP address to see how much you made off them, then they manipulate your rolls.  The 'seed change' is just there to make it look nice.

You don't know that for a fact. They can't manipulate your rolls without it being detectable. The provably fairness is there so that anyone who thinks they may have been cheated can determine whether or not they were cheated.

Provably isn't even a god damn word, its made up bullshit.....

Except it is. It means "in a manner capable of proof". ie. a site is provably fair if the rolls are generated in a manner that the site is able to prove is fair. It is the adverb from "provable", capable of proof:

legendary
Activity: 1330
Merit: 1001
September 29, 2014, 07:38:41 AM
its simple to me...fair if i win and unfair if i lost and unfortunately I always lose in this site no matter how much i deposit in here
If your roll is not being manipulated by the casino operator it is fair.
full member
Activity: 196
Merit: 100
tolong sumbangannya pak...
September 29, 2014, 06:42:39 AM
its simple to me...fair if i win and unfair if i lost and unfortunately I always lose in this site no matter how much i deposit in here
member
Activity: 78
Merit: 10
September 29, 2014, 02:49:11 AM
Manipuation is a really unfair act.  I believe this pd can get money from every bet. Losing  a btc in PD is usual. You are unlucky enough. I suggest u to use small money if u cant afford to lose it. And bet smaller size. Just a suggestion
newbie
Activity: 24
Merit: 0
September 29, 2014, 01:17:32 AM
I cannot provide any concrete proof, aside from this picture

https://i.imgur.com/En6GaaJ.png

and how this is not the only occurrence of this loss streak. A user MoFo on PD with an initial bet of less than 0.01 and doubling on each loss, he doubled his money all the way to over 5 bitcoins and lost that all on ~50/50 chance of a win which were around 10-15 losses.
So while this may just come from the randomness that hashes are, it can also be due to selective hashes on server-side.

I can't prove myself right 100%, but I don't think anyone can prove that it isn't happening.

First of all, I'd like to preface this by saying that PrimeDice has never manipulated a single roll. We are actually profiting below our expected profit thus far. You certainly bring up a reasonable argument and it is something I will absolutely discuss with our developer. However, I don't feel posting a screenshot of an 8 loss streak proves anything, millions of bets are being placed and the term "concrete" should not precede it.

Your other example with MoFo is also moot, he's placed thousands and thousands of bets and has wagered nearly 1000BTC

However, I understand the underlying point you are making and am open to the suggested changes. While we do have a provably fair system it appears it is not as provable as it could be.

This is an interesting concept, but it doesn't relate just to PD, more like to anyone.

I think PrimeDice are more vulnerable to this kind of accusation than either Just-Dice or CoinRoll, because PrimeDice changes the server seed before every roll, whereas CoinRoll only changes it once per day, and Just-Dice never changes it unless the player requests that it be changed.

Not that I think PrimeDice is cheating anyone; I don't.  It's just harder to verify that they aren't - you would have to make a note of each individual server seed, which probably nobody is going to be prepared to do.

The points expressed here and throughout the thread have been duly noted and will be discussed with our developer. We're launching a new version of primedice within the next two weeks and this will be brought to the table. I'm not an expert in provably fair or cryptography, however I am an honest and decent person and am willing to work with the community towards a fix.


It's also important to note that vulnerabilities exist even in a perfect "provably fair" system, even SD could manipulate results if they wanted to.

http://www.reddit.com/r/Bitcoin/comments/1frm4x/provably_fair_by_bitzino_not_provable_with/

In many cases Provably fair is not enough. The author of that post mentioned he was working on provably fair II which is also something I'll be looking into implementing. November has my thanks for bringing this to my attention. If anyone has any concerns in the meantime, I suggest changing your client seed at the top of the betting page.

Best Regards,

Stunna




I have lost my 1BTC from your prime dice wallet. 0c694bcb897489615a5c013d0acfb71ddcf88a68a27b0281c7d7fbbc437df3d4 this is the transaction available in the transaction log. How do you explain this?
sr. member
Activity: 462
Merit: 250
September 24, 2014, 06:42:56 AM
Does anybody have any recommendations for a legit dice site? Im sick of losing money... lost 1 btc to this shit site and im not losing anymore..... ppl are asswads on there too and the admins mute me for calling somebody a pussy when I get constantly harassed?  People try to act like ur friend but are just dickheads tryin to make you lose money in the end........  I have a feeling PD is a close knit group of friends that just scams the fuck out of unsuspecting players.


ANyway... honest suggestions would be nice as I have some btc to make up now......  I'm not a retard but I can definately see PD builds you up and rips you down 10x harder.  Only ppl that stick around seem to be friends or low wagers.   Seen a few people with profit but they are probably affiliated with the site somehow......

I've bet on PD before and my experience has been fine there. I agree with you that people try to act like your friend, but that's only because they want you to tip them. You can also verify that you haven't been cheated. If you don't like PD then try PRCdice.eu and dice ninja but DN isn't very user-friendly.
sr. member
Activity: 294
Merit: 250
September 24, 2014, 06:38:22 AM
Does anybody have any recommendations for a legit dice site? Im sick of losing money... lost 1 btc to this shit site and im not losing anymore..... ppl are asswads on there too and the admins mute me for calling somebody a pussy when I get constantly harassed?  People try to act like ur friend but are just dickheads tryin to make you lose money in the end........  I have a feeling PD is a close knit group of friends that just scams the fuck out of unsuspecting players.


ANyway... honest suggestions would be nice as I have some btc to make up now......  I'm not a retard but I can definately see PD builds you up and rips you down 10x harder.  Only ppl that stick around seem to be friends or low wagers.   Seen a few people with profit but they are probably affiliated with the site somehow......
sr. member
Activity: 294
Merit: 250
September 24, 2014, 06:31:24 AM
PD is definitely  a scam.  It wouldn't exist if it wasn't.......  I know for a fact the owners track peoples IP address to see how much you made off them, then they manipulate your rolls.  The 'seed change' is just there to make it look nice.

Provably isn't even a god damn word, its made up bullshit.....
legendary
Activity: 2940
Merit: 1330
July 31, 2014, 12:10:43 AM
But the problem is many gamblers don't really understand anything about SHA hashing and so they probably consider the "provably fair" just a gimmick.

That's true.

All I would say is if you're too lazy or too dumb to understand how provably fair gambling works, please don't make comments about it.

Leave that to the people who understand it.
hero member
Activity: 569
Merit: 500
July 30, 2014, 11:02:00 PM
I think all dice gambling is same
last time i gamble with win chance 60%, lose 10x row

and if you roll with big bet, you usually los even with high chance win

that's why lot people open gamble site

I think you're wrong.

Most dice sites are provably fair, which means you can check that the rolls are fairly generated.

You need to do a little work like verifying hashes, picking random seeds and such like, but if you are willing to do that you can be sure the site isn't cheating you.

Exactly.
But the problem is many gamblers don't really understand anything about SHA hashing and so they probably consider the "provably fair" just a gimmick.
legendary
Activity: 2940
Merit: 1330
July 30, 2014, 03:06:15 PM
I think all dice gambling is same
last time i gamble with win chance 60%, lose 10x row

and if you roll with big bet, you usually los even with high chance win

that's why lot people open gamble site

I think you're wrong.

Most dice sites are provably fair, which means you can check that the rolls are fairly generated.

You need to do a little work like verifying hashes, picking random seeds and such like, but if you are willing to do that you can be sure the site isn't cheating you.
sr. member
Activity: 938
Merit: 255
SmartFi - EARN, LEND & TRADE
July 30, 2014, 06:48:46 AM
I believe that Stunna has already fixed this, and made it so you can choose your client seed. I think the client seed is generated in the client with JS now.

Can anyone confirm? I am not a programmer and can't look myself.
sr. member
Activity: 252
Merit: 251
Knowledge its everything
July 30, 2014, 05:34:23 AM
I think all dice gambling is same
last time i gamble with win chance 60%, lose 10x row

and if you roll with big bet, you usually los even with high chance win

that's why lot people open gamble site
full member
Activity: 238
Merit: 100
July 29, 2014, 06:22:04 PM
This site is scum.

Why did you have to bump this thread Sad -_-
legendary
Activity: 1022
Merit: 1000
July 29, 2014, 06:15:50 PM
This site is just scum, i have deposit money and bever recieved. contact stunna and he did not help.
fuck primcedice

First, this thread is about provably fair, not deposit complaints.

Second, your complaint would have a lot more validity if you posted some images of your messages sent to and received from Stunna.  Just like he did here.  Which, interestingly, seems to be about your issue and him resolving it.

Finally, given how many users Primedice has I doubt they are screwing them out of deposits.  There is no need to do that, they win plenty plenty with their 1% edge.

Good Luck.
newbie
Activity: 2
Merit: 0
July 29, 2014, 01:03:03 PM
Just dice is where its at, best site ever.
RIP Sad ;(
sr. member
Activity: 770
Merit: 250
July 29, 2014, 11:05:23 AM
This site is just scum, i have deposit money and bever recieved. contact stunna and he did not help.
fuck primcedice
hero member
Activity: 625
Merit: 500
July 29, 2014, 11:00:26 AM
This site is scum.

Would you mind telling us a little bit details what happened?  Huh
sr. member
Activity: 770
Merit: 250
July 29, 2014, 10:57:09 AM
This site is scum.
hero member
Activity: 745
Merit: 501
June 23, 2014, 08:55:31 AM
This isn't really an accusation that PrimeDice is cheating. Just that their system is a bit flawed. More that we can't know by default if results are fair unless one changes his own seed for every roll. It can be provably fair, but only in that specific circumstance. A provably fair system shouldn't have a cheating possibility under any scenario, regardless of if the site cheats or not.

PrimeDice: changes secret every roll - makes the user have to do much work to verify (too hot)
CoinRoll: changes secret once per day - makes the user wait too long to verify (too cold)
Just-Dice: changes secret when the user asks to change it (just right)

Dooglus, I don't think Coinroll is "too cold". Doesn't JD provides a default client seed too? Need to change client seed once, good to go forever. Much better.

Fixed daily secret for everyone seems good. It makes it pretty much impossible to cheat players under any circumstances. Most people don't need to verify and won't do it immediately after betting or won't do it at all. The daily secret cannot be be changed without altering all previous bets for that day. Finding a secret that match all bets for the day would simply be impossible. We also don't provide a default client seed, avoiding any possible claim we chose one with lucky numbers favorable to the house for the current day/server secret. We simply use the user's deposit tx ID. Put simply, Coinroll users don't need to do anything to be on the safe side and we don't have to provide a default secret.

The whole point is everyone don't need to even verify and often most people won't. So archived bets are provided (not simply one by one bet lookup on the website, downlaodble archives for easy checking with script). Pretty much anyone can just run a check on the archives and report anything suspicious. When people are playing, they want results instantly. Verifying bet timing isn't as important. If you want to check that, you can always check bets in batch later. Being able to verify them immediately wouldn't change their loss/win. No new information. Just not as time sensitive, unlike betting which needs to be instant, so Coinroll use that system. Just seems like a stronger provably fair system. We have yet to see any demand for instant verification.
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