Bitcoin Forum

Provably fair????

How is the random number chosen?

How do we know it wasn't you who chose the number? There will be no way to prove it was chosen by that site.

Ah hell, I'll give it a go

Just entered.
Lets see how it goes.

BTW, I had a post about provably fair that didn't get any responses, but I couldn't think of a way that it would not be. Here it is:

I have thought alot about things being provably fair and how to ensure that. I think I have come up with a good plan and here it is:
Provably Fair

A randomly generated 7 digit number is created using Random.org and an image is uploaded online. The number and the link are then hashed (using this form: 1234567_link) and the resulting hash is displayed at the bottom of the raffle for you to verify after the raffle has concluded. Each spot in the raffle is purchased and has a unique transaction ID. The first number in this transaction ID is used i.e. c5a93b86654df5c31d04e9465e8510be1445bf1822f727fe08c31bd17f3g81ca
is registered as 5. All transaction numbers are added together (5+x+x...) until a sum is reached and that number is multiplied by the random 7 digit number. That number is then divided by the total number of entrants into the raffle to choose the hash # that will be used in the next step. The number is divided by the total number of entrants as many times as needed until a suitable number is reached. All numbers are rounded to the nearest whole integer.
EXAMPLE: If the random number was 8349215, the transactions total was 27, and the total number of spots in the raffle are 11.
8349215*27=225428805    225428805/11=20493527.7273
That number then divided again and again by 11 eventually gives you 11.56... which would be round up to 12 meaning we would have to divide again to get 1.0516... meaning the first spot in the raffle will be chosen to provide the hash.
The last 10 digits of the hash will then be input at http://we.lovebitco.in/raffle.html with the correct number of entrants and the winner of the raffle will be chosen.

The problem with the generation of the random number isn't the generating it part. It's finding a way to prove that you actually didn't influence the outcome. The live feed idea is good as long as you have the unix timestamp showing (which is automatically created on random.org) and have available channels for the stream (skype, livestream, etc...). Even then you would need to record it as well and upload that to the site for people to verify, plus if no one watched it live, or only a few then you could face accusations of collusion. For that to work, you really need a lot of people watching it live to verify for everyone that there was no cheating.
Like I said, I though a lot about this and different ways to work it. This was my solution, but I'm sure there are others out there that would be easier to implement and could work just as well.

As long as you had say a running unix time stamp at the bottom of the screen and proved that there were no edits and only one random number was generated I think that would work. It would help to also have in your video time from before and after the draw to show that a new number wasn't generated if the first one was unfavorable to you. i.e. Drawing held at 07:30:xx needs to have footage from 07:29:xx all the way through 07:31:xx to prove this. If you don't  then you could randomly generate at least a few numbers during that one minute time frame until you found one that was suitable and used it.
BTW I'm not trying to imply that you would cheat, I'm just trying to help you not be accused of cheating. If you did these things and posted the winner in the chatbox and uploaded the video to youtube or whatever I think that would be good. Just make an announcement in the chatbox a few minutes before the drawing will be held letting everyone know the exact time frame of the draw.

0.0522 BTC
http://we.lovebitco.in/raffle.html
First ticket number:1
Last ticket number:8
Last 10 digits of blockhash: b354c721fc8
Winning Ticket: 5
Winning Wallet: 1EJ4fgnVMy1WkUmYxdBJPuS2AgU8yTkA62
 

Well, I can confirm it works.
Err, mdzedzej, I accidentally sent in 0.01 this time around... Any chance you could send the excess back to me?

Had my excess returned, you're a good guy ;D I'm in again. Odds aren't looking too bad either

New Chat room and radio station!

Oh mean, the jackpot's up to 0.01. Not a bad payout for the price. Best of luck to my fellow entrants  :)

bump

He was at work yesterday and said he will pay today. He is a man of his word and is busy. He will pay today for sure. I know we are all upset about the loss of funds in his ponzi but he lost money as well and is trying to establish himself as a legitimate businessman.

However, he should have updated you about when he was going to pay so he is at fault for that.

Well,ok then.I didn't know that,sorry.I know he's legitimate and he's doing great but I wanted to know just to be sure.Thanks.

lots of newbie with the ponzi,  Hmmm I smell a bunch of con artist waiting to build somethin big and run after

I thought he scammed me 10BTCs, but it was PayPal fucking with me and him for buying and selling Bitcoin's.

He showed me proof, that indeed it was PayPal, not issuing a refund.


So I find that honorable. So I removed his Negative feedback I left him and gave him a positive.

Round will rollover again.

BUMP

Game is up and running. Still have adspace for sale/rent

Dude, he's paying me back. He paid all the others back. I saw it in the skype group. So, just contact him. He WILL pay you back. As for the lotto, looks good. Seems auto.

If i missed something please skype me.

What's your skype?I also haven't been paid.

I made done rash comments earlier and insulted mdzedzej and defamed his character as I didn't realize he had already paid me back over a week ago. I am frustrated over another ponzi and took it out on him which was unfair and I truly apologoze. He is trustworthy of any amount if btc and makes high quality websites which I was glad to be a part of.

bump

he dint reply me on skype :(

you didnt message me on skype

*** For all to see***
Skype:

Mikedzedzej

I see the current jackpot are 0.002 BTC. So I buy 1 ticket and got back 0.002 Btc which mean I'm the winner right ? But why the jackpot not increase with my purchase of 0.001 BTC ? Why I not get 0.003 Btc ?