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1  Economy / Gambling / crowex.com peer to peer betting made easy on: March 05, 2015, 10:03:56 PM
Hi,

   Is anyone interested in peer to peer gambling?

Bet with any other individual directly online on sporting events (or anything else).

www.crowex.com makes this type of thing really simple.

Thereís a simple interface for agreeing on the terms of a bet.

Iíve posted a topic in the project development thread where you can have a free bet with me if you want to try it out.

 https://bitcointalk.org/index.php?topic=977090.0

2  Economy / Games and rounds / crowex.com free bet promotion - win bitcoin on: March 05, 2015, 02:07:24 PM
a chance to win some bitcoin for trying crowex.com

Hi everyone,

Itís taken an enormous amount of time and effort for us to design and build Crowex, a web app which I hope will become a key platform for peer to peer contracts in digital currency.
I really believe Crowex has some unique aspects. The application was built from the ground up to provide a simplified process for escrow transactions. Iím very enthusiastic about the possible uses of Crowex, and now I need members of this forum to try it and tell me what they think.

I realise that you may not be as excited as me about my platform for digital currency contracts, so I have come up with this ingenious plan for getting you to try Crowex, while at the same time having some fun.

As you may know peer to peer contracts can be about absolutely anything from simple digital currency exchanges to buying goods and services. But for this exercise I thought it would be more fun to have a bet.

How to win the Bitcoin:

  • Create an account at www.crowex.com and negotiate a bet with me on anything you like as long as it can be easily publicly verified and thereís a sporting chance for both of us (50:50 or close).
  • I send 0.03 Bitcoin to the crowex (escrow) address.
  • If you win, I release the Bitcoin to you, if you lose you release the Bitcoin back to me. Simple!

Get Started:

All you have to do is
  • Register/Sign in to crowex.com and post your Crowex user name here.
  • Then check your contracts page on Crowex and Iíll invite you to enter into a contract (my user name: crowexFreeBet).
  • You then accept the invitation and write your bet.
  • From there on in we can use the chat facility on Crowex to discuss and finalise the contract 
  • Any questions before you start, please post here, if not join up at crowex.com and WIN BITCOIN!

Small Print:

  • I wasnít one of the early miners, so Iím forced to set each bet at 0.03BTC.
  • Free bets limited to the first 50 people
  • You have to have posted in this forum in the last two months from the date of this post and have at least a few posts.
  • A fundamental point of a crowex contract is that thereís an arbitrator. I have asked an independent forum member (FuzzyBear) to arbitrate these bets.
  • In order to protect myself from anyone who is unwilling to stick to the spirit of this exercise, I reserve the right not to bet with anyone without disclosing a reason.


YOU HAVE ABSOLUTELY NOTHING TO LOSE apart from a little of your time, for which I will be very grateful.

Good luck!

3  Bitcoin / Development & Technical Discussion / private key threshold scheme on: January 23, 2015, 01:40:17 PM
This  https://www.crowex.com/static/digconapp/crowex_protocol.pdf is a protocol based on this  https://en.bitcoin.it/wiki/User:Casascius/Escrow_scheme_draft entry in the bitcoin wiki.

 Weíve built a web app (www.crowex.com) for negotiating  2 of 3 type escrow contracts and weíve used the above protocol to incorporate a threshold scheme. It is a slightly different approach to using threshold signatures.

I believe in order for this to be a verifiable secret sharing scheme it would technically still require that the two parties in the transaction have direct communication with each other and not through the server. However, by using ECDH we are able to avoid the server being party to certain information and the parties can communicate directly, out of band, if they wish to verify their public keys.

 Iíve posted the protocol here in case there are any technical questions/comments.
4  Bitcoin / Project Development / [BETA TESTING] crowex.com on: January 13, 2015, 01:08:20 PM

hi,
  We are looking for beta testers for our escrow (or crowex) website.

www.crowex.com

THIS IS BETA TESTING.

We donít make any guarantees so, for the moment, please use this with nominal amounts.
More information in the resources section.
For best results use use an up to date version of Chrome.
Each contract is specific to the browser and device that it is initiated with.

Any feedback is appreciated.

Thanks!
5  Bitcoin / Development & Technical Discussion / ECDSA 2 of 2 signing on: March 11, 2014, 03:29:56 PM
hi,
 After coming across the blind signature protocol in this forum http://oleganza.com/blind-ecdsa-draft-v2.pdf I've designed a 2 of 2 ECDSA signing protocol. It's only suitable for a one time signature. Any feedback is appreciated (thanks andytoshi for some useful pm feedback prior to post)

 https://www.dropbox.com/s/zaxkh0uy7zgavm1/2%20of%202%20ECDSA.pdf?dl=0

 Smiley
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