[bisq-network/projects] Research on solutions for DIDs (decentralized IDs) in Bisq (#55)

[chimp1984]

As identity will play a key role in the p2p network layer I can share my preliminary view on it.

An identity is a key pair. For most cases and network it includes also the network address(es) (onion address, i2p address).
Each interaction (take offer) comes with its own isolated new identity. So taking 2 different offers from the same maker will appear as its 2 independent traders if both use the strict mode to isolate each trade.
The user can manage their identities and can decide to prefer reputation-based features which will require to re-use identity for building up reputation (e.g. like in current Bisq where you can see you have traded x times with same trader, thus giving some level of security that this user is likely not a scammer).
User will be also able to attach more meta data to an identity like their social media account if they wish to do that. They get informed about the trade offs between privacy <-> reputation but they can make their choices.

Maybe there will be possible more complex featueres where a signature of one identity can be used as backing security for another identity, similar as in the account age witness model. But that needs more thoughts. 
There might be also options to re-gain privacy by using cryptographic techniques like blind signatures, but again that will require more time to figure out how this could be used in that context.

So basics from my side:
- Identity is 100% user controlled and can be customized to different use cases.
- Default is each interaction appears like a fresh identity.
- Other extreme of the spectrum is that the user uses only 1 global identity and connects that even to outside real-life or semi-real life identities.

 

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