Reputation and game theory | Bitcointalksearch.org

MoonShadow

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Quote from: harley4noble on October 18, 2010, 06:16:34 AM

I understand the concept of Bitcoin but please tell me how to make use of it and what are its applications ?

I recommend that you take a little more care about protecting your identity. I would suggest removing the photo and your real life address, at a minimum.

Kids these days....

theymos

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Harley4noble is a spam bot...

grondilu

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Quote from: harley4noble on October 18, 2010, 06:16:34 AM

I understand the concept of Bitcoin but please tell me how to make use of it and what are its applications ?

Well, you can buy some stuffs with it. Go to http://grondilu.freeshell.org/bitXmetal.html for instance. You can buy gold and silver there Wink

Drifter

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Quote from: harley4noble on October 18, 2010, 06:16:34 AM

I understand the concept of Bitcoin but please tell me how to make use of it and what are its applications ?

Bitcoin will have many uses when it gains a little age. Unlimited free (or close to it) electronic transactions worldwide. No third party to simply take a chunk for themselves.

A WORLDWIDE currency system. No US Dollar or British Pound. No exchange fee for currencies. The securities of a bank with much better privacy to go along with it.

You'll be able to use it to buy things just like paypal. Subscriptions, services, electronics. Anything you want from gold to paper plates. Pay friends with a click of a button, no fee and the utmost security. When bitcoin gains more portability, you'll be able to "bump" phones or similar to exchange contact info and trade bitcoins through your phone (which you can already do anyways with mybitcoin.com).

The possibilities are endless. Anything you use real money for, you will be able to use bitcoins for.

I would recommend getting involved as soon as possible to get as much benefits as possible. Give it more time to blossom before you see the overall benefits.

harley4noble

newbie

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I understand the concept of Bitcoin but please tell me how to make use of it and what are its applications ?

Dennis

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True. Mainly what I'm saying is, make it a separate project, and get up to speed first on the literature, which is a lot more advanced than anything being discussed in this thread. (I'm not up to speed either, I've just skimmed.)

kiba

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Quote from: Dennis on October 12, 2010, 05:17:33 PM

Google peer-to-peer or p2p reputation systems and you'll see it's an active area of research, with all kinds of sophisticated schemes in development.

I don't think there's any need for the bitcoin project to get directly involved, any more than the Fed is involved in credit bureaus or the FTC. It's pretty interesting stuff though...

Bitcoiners, however, have an interest in reputation system because it is directly applicable to the bitcoin economy. We have no court and police, but the reputation of men.

Dennis

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Google peer-to-peer or p2p reputation systems and you'll see it's an active area of research, with all kinds of sophisticated schemes in development.

I don't think there's any need for the bitcoin project to get directly involved, any more than the Fed is involved in credit bureaus or the FTC. It's pretty interesting stuff though...

SmokeTooMuch

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I can cross-reference all 10 of the accounts.
Your approach seems like a good idea but I think it isnt the last word on the subject.

grondilu

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Quote from: SmokeTooMuch on October 09, 2010, 01:54:15 PM

Quote from: grondilu on October 09, 2010, 04:56:56 AM

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On October, 23th 2010, I made a commercial transaction with a person whose public GPG key was IDXXXXXX.
The transaction was done without any problem.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEARECAAYFAkywLWsACgkQq17371C4DmjLUgCgvBAPXJg/mdv4PemxBRgHZ+iw
qnUAoI+bt6Nt7FG+3H/lDe9qEb4wWN0H
=rop/
-----END PGP SIGNATURE-----

What prevents me from generating 10 GPG keys, publish a message with the first 9 that there was a successful trade with number 10 (and in the opposite direction) and then scam people with my 10th account which now has a fake reputation ?

Nothing,,but it might look suspicious if the 9 GPG key are referenced by only one source.

SmokeTooMuch

legendary

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Quote from: grondilu on October 09, 2010, 04:56:56 AM

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On October, 23th 2010, I made a commercial transaction with a person whose public GPG key was IDXXXXXX.
The transaction was done without any problem.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEARECAAYFAkywLWsACgkQq17371C4DmjLUgCgvBAPXJg/mdv4PemxBRgHZ+iw
qnUAoI+bt6Nt7FG+3H/lDe9qEb4wWN0H
=rop/
-----END PGP SIGNATURE-----

What prevents me from generating 10 GPG keys, publish a message with the first 9 that there was a successful trade with number 10 (and in the opposite direction) and then scam people with my 10th account which now has a fake reputation ?

FreeMoney

legendary

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Strength in numbers

Quote from: ribuck on October 09, 2010, 07:02:55 AM

99% of the population don't have the skills or understanding to use a PC.

Used to be the case. And there is going to be much higher than 1% competence in the current bitcoin community. And this solution doesn't have to be the ultimate one anyway.

ribuck

donator

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99% of the population don't have the skills or understanding to generate and use a GPG key.

grondilu

legendary

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Quote from: kiba on October 08, 2010, 10:20:55 PM

Perhaps now is the time to discuss actual implementation of a reputation system. As it stand, a German scammer probably got away with some bitcoins.

I thik we might just make it simple : a database of evaluations of market participants. It doesn't have to be decentralised. Google will do the job. Here is how I see it.

All participants should be identified by a GPG public key. Once a trade is successful, both participants should sign and publish a message such as :

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On October, 23th 2010, I made a commercial transaction with a person whose public GPG key was IDXXXXXX.
The transaction was done without any problem.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEARECAAYFAkywLWsACgkQq17371C4DmjLUgCgvBAPXJg/mdv4PemxBRgHZ+iw
qnUAoI+bt6Nt7FG+3H/lDe9qEb4wWN0H
=rop/
-----END PGP SIGNATURE-----

I'll do this kind of things on my site (http://grondilu.freeshell.org/bitXmetal.html)

Google robots would collect all those informations, so that one could have a fairly large amount of report from any GPG ID key.

It wouldn't be perfect, but it would do the job not so bad I think.

kiba

legendary

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Perhaps now is the time to discuss actual implementation of a reputation system. As it stand, a German scammer probably got away with some bitcoins.

Babylon

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Quote from: azazar on October 07, 2010, 05:42:14 AM

Quote from: grondilu on October 07, 2010, 05:06:49 AM

Quote from: azazar on October 07, 2010, 04:56:57 AM

This can be implemented as a separate project. It can be a kind of social network, maybe even similar to facebook, but decentralized. Having a trust system is not the only thing it could provide...

Well, this would be Diaspora.

But before it is implemented as a software, I'd like to see some theoretical, almost mathematical/game-theory-oriented approach to this, in order to determin whether or not it is possible, and how efficient it would be.

I think, that every person in that network should have it's own small trust list, which is filled manually. And a large trust list, which is loaded from other people, that are present in that small list. This can be done recursively to make a full list.

For example:
A trusts both B and C
B and C trusts D
So A should see that, there two of his trusted parties, that trust D

I'm not not familiar to game theory, but I think it should work.

Basically the idea I outlined. Except that in mine it was not a binary rating system but a scaled one.

azazar

newbie

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Quote from: chickenado on October 07, 2010, 10:18:58 AM

There are at least two independent metrics

1) how much A trusts B's honesty
2) how much A trusts B's trust in C's honesty

There are two options:
1. Use same values for trust, and trust in honesty(and absence of stupidity in choice of trusted parties).
2. Use separate values.

I think, that it should be optional to end-user.

chickenado

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There are at least two independent metrics

1) how much A trusts B's honesty
2) how much A trusts B's trust in C's honesty

azazar

newbie

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I simplified it a bit. Trust can also be negative for those, who is not trusted. A trusts D = average(AB*BD,AC*CD)

mpkomara

full member

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Merit: 100

Trust is never binary.

A trusts B 99% of the time
A trusts C 99% of the time
B trusts D 99% of the time
C trusts D 99% of the time
Do we know if B trusts C and vice versa?
If not then

A trusts D = min(AB*BD,AC*CD) = 0.99 * 0.99 = 0.9801

Topic: Reputation and game theory (Read 4979 times)