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Author Topic: Getting massive acceptance of Bitcoin  (Read 3232 times)
Hal
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January 20, 2011, 07:00:36 PM
 #21

It's possible to do purely P2P poker using cryptography to shuffle the cards. The problem is that either all n players have to cooperate to decrypt a card, in which case if any player leaves the hand can't be completed; or t < n players suffice to decrypt a card, in which case any t players could collude to learn other players' cards. But it could work for a friendly game.

Hal Finney
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fabianhjr
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January 20, 2011, 07:21:04 PM
 #22

As a matter of fact it is possible using Public key crypto!

Handshake:
-Generate a key pair.(And keep track of all of them so they can't be reused)
-Hash the private key of both for the pseudo random generator and create the "random" deck.(Separate decks. Maybe cards are not going to be the ideal P2P betting game xD)
-Whoever has the digest of smallest value of their public key"A" draws a card first then "B". One by one hashing their signed card and communicating it to the other.(Which he won't be able to interpret at this point, though, he can validate it later on)
-Play whatever betting game you wish. Smiley
-Validate the other didn't cheat(He gives you the signed cards he draw and you compare them to the hashes.

Hopefully I word it correctly. You got the basic idea.

genjix
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January 20, 2011, 08:10:38 PM
 #23

It's possible to do purely P2P poker using cryptography to shuffle the cards. The problem is that either all n players have to cooperate to decrypt a card, in which case if any player leaves the hand can't be completed; or t < n players suffice to decrypt a card, in which case any t players could collude to learn other players' cards. But it could work for a friendly game.

Actually that's very slow. If you do choose to accept a central server (that they generate unbiased random numbers) then you can do a distributed shuffle. However you have the problem of one person leaving with their keys when they loose.

Then you have the other problem of needing an escrow to hold the funds in the current pot. It's definitely something I want to do in the future to protect against super-users but not a priority right now.
kiba
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January 20, 2011, 08:12:54 PM
 #24

Something gottach be THE killer app, right?

Which one?

MoonShadow
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January 20, 2011, 08:13:55 PM
 #25

Something gottach be THE killer app, right?

Which one?

Let the market decide.

"The powers of financial capitalism had another far-reaching aim, nothing less than to create a world system of financial control in private hands able to dominate the political system of each country and the economy of the world as a whole. This system was to be controlled in a feudalist fashion by the central banks of the world acting in concert, by secret agreements arrived at in frequent meetings and conferences. The apex of the systems was to be the Bank for International Settlements in Basel, Switzerland, a private bank owned and controlled by the world's central banks which were themselves private corporations. Each central bank...sought to dominate its government by its ability to control Treasury loans, to manipulate foreign exchanges, to influence the level of economic activity in the country, and to influence cooperative politicians by subsequent economic rewards in the business world."

- Carroll Quigley, CFR member, mentor to Bill Clinton, from 'Tragedy And Hope'
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