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Decentralized Reputation in OpenBazaar (blog.openbazaar.org)

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[–]CC_EF_JTF 8ポイント9ポイント  (0子コメント)

There's also a Medium version, if that's your thing:

https://medium.com/@therealopenbazaar/decentralized-reputation-in-openbazaar-4e3a3d0b0899

Washington put a lot of time into this and we'd love to get as much feedback as we can. Of course the ultimate test will come when we launch.

[–]seweso 6ポイント7ポイント  (10子コメント)

Maybe I missed something. But how does this prevent people from creating fake trades to create fake reviews?

[–]jonny1000 5ポイント6ポイント  (6子コメント)

It doesnt

[–]seweso 0ポイント1ポイント  (5子コメント)

Why doesn't it create a web of trust? Based on the 6 degrees of separation thing. You trust some people, they trust some people and indirectly you should be able to trust most people. Via a graph you should be able to determine who can/cannot be regarded as a real person.

The only problem is that the marketplace would look different for everyone depending on the people they implicitly trust. But maybe thats not a bad thing.

[–]jonny1000 0ポイント1ポイント  (4子コメント)

DrWasho's earlier essay talked about this, yes. This one did not

[–]drwasho 1ポイント2ポイント  (3子コメント)

No, I do talk about WoT in this article.

[–]jonny1000 0ポイント1ポイント  (2子コメント)

"While we earlier explored the web of trust (WoT) model, the system described in this article is not a web of trust. "

[–]jaydoors 0ポイント1ポイント  (1子コメント)

"Even a web-of-trust model, which is excellent at detecting suspicious islands of ‘reputable’ users, will not be able to distinguish between real and fake ratings of a Vendor. Why? As discussed, Buyer identities are not disclosed in the transaction summaries (unlike trade receipts, which is necessary for dispute resolution); Buyers are only represented by a bitcoin address. This is the equivalent of a single-use pseudonymous identity that would be the cause of suspicion in a web-of-trust model. That said, a web-of-trust graph based off transaction summaries where the Buyer is known (i.e. the GUID and Blockchain ID is disclosed) would be a useful tool."

It is near the end

[–]jonny1000 0ポイント1ポイント  (0子コメント)

Ok, I meant details of how to implement a WoT were not discussed

[–]drwasho 1ポイント2ポイント  (0子コメント)

You can never prevent that, no matter what system you choose.

But since ratings are tied to Bitcoin transactions, weak attempts to fake ratings may be easily detected.

[–]bennyb0y 1ポイント2ポイント  (1子コメント)

No system can guarantee that a vendor does not do this. The paper specially describes this activity and a potential solution that sounds quite interesting.

Read the Challenges section:

As transaction ratings in OpenBazaar must be tied to a bitcoin transaction, there is a cost – albeit a small one – to making a rating. Furthermore, the bitcoin transaction graph may emerge as a useful filter to assess/score the legitimacy of a transaction rating. For example, if an attacking Vendor uses the same coins to make 100 transactions in order to create 100 transaction ratings, this can be easily spotted with little analytical sophistication. There are many opportunities for third parties to build entire services on assessing the reputation of a Vendor.

Also generally its good to read the entire article.

[–]MistakeNotDotDotDot 0ポイント1ポイント  (0子コメント)

So it predicates its security on it being hard to make Bitcoin anonymous? That seems like a downside.

[–]gubatron 13ポイント14ポイント  (0子コメント)

This IMO is the most important system component for OpenBazaar, I'm so glad the team finally decided to go with a specific approach to solving this problem. It would've been impossible otherwise to trade without knowing sellers in advance.

Great job guys

[–]stevev916 2ポイント3ポイント  (1子コメント)

This is a really important problem... one I'm facing on a website I'm building.

Once you establish identity, you could build and share trust & reputation across sites.

We need standards here, but I think existing technologies could help... e.g. if more sites support oauth.

Imagine you have txn history on localbitcoin, ebay, bitrated, etc.

If other sites could "link" those accounts, you could prove trust for that identity across sites. I don't see why its in eBays or localbitcoin interest to support oauth however.

Onename gets around oauth in a unique way... They require you to verify your account by posting something to your public profile as proof.

I think a service like onename (or someone who does it better, faster) could build the next backbone of trust for bitcoin markets... where you don't have credit card fraud protection. A service could link trusted reputations across separate markets, by proving identity where the site doesn't natively support it.

[–]drwasho 0ポイント1ポイント  (0子コメント)

Yeah I think there's a lot of potential to do what Alibaba is doing in regards to Vendor reputation, which is used as a De facto credit rating to issue loans.

More stuff to come on that.

[–]SundoshiNakatoto 3ポイント4ポイント  (0子コメント)

I love how Fred Wilson is used in the example

[–]majorpaynei86 2ポイント3ポイント  (1子コメント)

I am so excited for this! I feel like a 12 year old girl!

[–]Pope_Pedobear 2ポイント3ポイント  (0子コメント)

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[–]sreaka 0ポイント1ポイント  (0子コメント)

Great stuff, can't wait for OB.

[–]homad 0ポイント1ポイント  (0子コメント)

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