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Yeah it's already pretty much finished on @hiveonboard.

I'am working on draft, which describes the system in detail and will be introduced to the community soon.
It will be a open standard, so anyone is free to make use of it or not.

I would suggest to wait covering this topic for now until at least one hive dApp will integrate this feature. For now feel free to use the referral link yourself and get a feeling how it works - maybe call it beta-testing :)

ok great. I will wait til a dapp rolls it out.