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Author Topic: •••• COINICHIWA • DICE • SINCE 2014 • INVEST • NEW DARK THEME ••••  (Read 32748 times)
vit1988 (OP)
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November 26, 2014, 05:10:04 PM
 #41

This looks challenging, I'm no md5 expert and wouldn't know how to generate such a collision. However, to break the provably fair you only need to demonstrate:

Code:
md5([32characters]-[10characters]-1) == md5([other32characters]-[10characters]-1) 

The server seed is the same for the whole series. If I manage to find a collision for one bet and manipulate that single bet it will be obvious after revealing that the one bet with a different server seed is manipulated. You actually need to demonstrate this for all bets of a series and you cant even demonstrate it for two and it is pretty hard to find even one collision.

Anyways... showing a hash of the server seed before is a good idea. I will implement this.

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November 26, 2014, 06:04:55 PM
 #42

Ok, i must confess that is true for the first bet of a series and i will implement the seed-hash display in advance... but that still does not make a difference for the choice of the hashing algorithm for this purpose  Tongue

Anyways thank you  Smiley

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November 26, 2014, 06:34:59 PM
 #43

Why more dice...?

Bitcoin users want something new, we have too much dice now, we need new options.

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November 26, 2014, 07:32:33 PM
 #44

Why more dice...?

Bitcoin users want something new, we have too much dice now, we need new options.

So, Why don't you create a new option? Don't expect everything from developers.


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pureelite
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November 26, 2014, 07:46:09 PM
 #45

any chance we can get faster bets?

any promos?

no faucet?
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November 26, 2014, 09:02:27 PM
 #46

any chance we can get faster bets?

any promos?

no faucet?

That site have faucet just type in chat /freecoins
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November 26, 2014, 09:03:43 PM
 #47

Why more dice...?

Bitcoin users want something new, we have too much dice now, we need new options.
I feel like dice is a cool concept, but every dice site has the EXACT same concept with really minor tweaks, so a new dice game would be cool, because they are very simple.
It would have to have a whole different concept than the basic 49.5x2 though
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November 26, 2014, 10:44:28 PM
 #48

Ok, i must confess that is true for the first bet of a series and i will implement the seed-hash display in advance... but that still does not make a difference for the choice of the hashing algorithm for this purpose  Tongue
/Sigh.  It really does. Just use sha256 and we can all be happy.

Most dice sites use hashes in two distinct ways:

1) to prove to you that they picked your server seed before you picked your client seed and didn't change it after
2) to generate the roll from the seeds and the nonce

It seems this site isn't doing (1) at all. It is (1) that needs a secure hash, because otherwise they can find a pair of server seeds with the same weak hash, show you the weak hash, and only after your first roll do they need to decide which of the two to use.

The hash used in (2) isn't so important - it doesn't need to be secure against collisions at all. Just so long as it gives unpredictable output if you only know part of the input.

As for all the talk about finding hash collisions (in (2)), you seem to be missing the point. In order for this site to cheat, they don't need to find two things that hash to the same long output. They only need to find two things which generate the same roll, which is a 1-in-10000 chance, and so much easier than finding a true hash collision. So on my first roll, the site can literally pick any server seed they like and make me lose. On my 2nd roll, they need to test an average of 10,000 server seeds to find one that gives the same 1st roll, and so will just a 100k hashes they can expect to find a server seed that makes me lose my 2nd bet as well.

For the 3rd bet it's harder, because there's only a 1 in 10^8 chance of finding a server seed which gives me the first two rolls I've already seen, and so the site will need to so around 200 million hashes to have a good chance of making me lose my 3rd 50% bet.

(and it gets 10^4 times harder each following roll - so players should roll 10 times for dust before playing "for real")

I guess I'm just repeating what Eric said, and to which you replied "I have no idea what you are talking about". Maybe I've put it in a way that you can understand?

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KingOfSports
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November 26, 2014, 11:00:50 PM
 #49

Site bankroll started at 10 BTC and now its 5.xx. How in the world did someone manage to wipe out 40% of the roll with 1% kelly active? Bug?

.







.
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November 27, 2014, 12:00:35 AM
 #50

What is the meaning of this?

$lucky = hexdec(substr($seed,0,8)

Hi!
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November 27, 2014, 02:51:34 AM
 #51

Can I ask again, what is the meaning of this.

$seed = $serverSeed . '-' . $clientSeed . '-' . $incrementalNonce;

especially this symbol " . '-' ."

thanks again

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November 27, 2014, 03:03:15 AM
 #52

I agree with whatever dooglus said...
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November 27, 2014, 03:27:09 AM
 #53

Congratulations on you new dice site. Smiley

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November 27, 2014, 04:56:17 AM
 #54

Faucet is :0.00000100 @@
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November 27, 2014, 05:09:53 AM
 #55

Faucet is :0.00000100 @@

100satoshi balance after you registered. faucet is 700 satoshis

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November 27, 2014, 07:10:31 AM
 #56

i like the name of the site, and it looks alright. a bit simple for my tastes but not bad. Is there any plans to upgrade the auto roll to be able to martingale or other strats?
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November 27, 2014, 09:39:10 AM
 #57

Wow, I think yesterday this site was in profit.
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November 27, 2014, 09:52:15 AM
 #58

Site bankroll started at 10 BTC and now its 5.xx. How in the world did someone manage to wipe out 40% of the roll with 1% kelly active? Bug?

Not sure what happened, but Eric did mention the site was messed up and he was playing with positive EV earlier.


BTW I just made ~0.04 on your site by playing with +EV. I didn't even use the affiliate scheme, which could've got me an extra 0.1%.  Can you see what you messed up? Hint: My username is `toString`
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November 27, 2014, 09:57:25 AM
 #59


Faucet:
Type /freecoins into chat to get some satoshis.



How much faucet is currently offered to play on the site?
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November 27, 2014, 10:00:13 AM
 #60


Faucet:
Type /freecoins into chat to get some satoshis.



How much faucet is currently offered to play on the site?

700 satoshi. It seems you can claim the faucet once every 60 seconds.
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