Let's say for case when I want to buy shoes from some website I never visited before

It's not quite easy to give a short simple answer as under the hood it is supposed to have a strong formalized protocol.
When you visit a shop, you will provide it only data it needs to complete your order.
But at the same time they may give you a proposal knowing your sizes and that those belong to a real person, without knowing personal sensitive info.
Implementation of the matter may differ. Crawlers , special "inboxes" etc.

And if it's a web of trust and you have connections with people you trust, you can get your keys back anytime. You depend on that people. And they also partly depend on you. I think it's even better because it actually embraces trust between people, instead of trust to some algorithms.

You see, it is vice versa). There's some basic math and cryptography that make possible async encryption. The rest are just consequences, promo, sort of.
We consider a solution that would guarantee recoverability of keys, you know.

The latter can be more accurate, but imagine all electronic devices are somehow gone (sun activity, it will eventually happen)

Ah, we then get back to stone age)

they may give you a proposal - so they don't know me, but can send me that proposal through some channel?

I'd say they sort of leave a message for you. Kinda anonymous postbox that only you have keys from.

In reply to @persono.id:matrix.org
Or maybe you personal AI agent scans markets and collects personal proposals that will fit your demands and params.

In reply to @persono.id:matrix.org

The latter can be more accurate, but imagine all electronic devices are somehow gone (sun activity, it will eventually happen)

Ah, we then get back to stone age)

I'm very sceptical about AI. It sure can do many things, but it doesn't have human understanding, so while being more accurate than human most of the time, it can make terrible inhuman decisions time to time.

Well, it's just a buzzword) Think of a crawler or robot. AI means self educating system, as simple as that.

In reply to @persono.id:matrix.org

they may give you a proposal - so they don't know me, but can send me that proposal through some channel?

I'd say they sort of leave a message for you. Kinda anonymous postbox that only you have keys from.

<@persono.id:matrix.org> > > they may give you a proposal - so they don't know me, but can send me that proposal through some channel?

I'd say they sort of leave a message for you. Kinda anonymous postbox that only you have keys from.

Well, if you call that anonymous after they got to know my size and preferences and probably my ip and other browser info and my name and adress because I can't buy other way than delivery. While the last bits might be inevitable, are the first ones opt-in, again?

You are trying to fit it in some existing solutions and technologies. But the whole system looks like a big open but encrypted (quantum computers safe) data totally managed by owners. Implementation is a different story.
ZKP is not so easy to grasp and good implementation is harder. But this is the key. Provide your depersonificated data with the only proof is that it belongs to a real person.
Recover your keys (by protocol).
Those are just a couple of fundamental properties.

Zero-knowledge is brilliant , but existing implementations are weak or expensive and there are a lot promising under development.Keeping you data local cuts off opportunities to access to depersonificated data, another key point of persono.id and there is no need to with ZKP.

Zero-knowledge is brilliant , but existing implementations are weak or expensive and there are a lot promising under development.Keeping you data local cuts off opportunities to access to depersonificated data, another key point of persono.id and there is no need to with ZKP.
Read it multiple times and still can't get what you mean. Keeping what data where?

Keeping data in a sort of a blockchain, but implement differently.

We don't see simple solution. - Me either... You kan replace your key, but you can't replace what you are... BUT you can also break what you are (loosing part of the body, getting ill, etc...)

You can't replace WHO you are, absolutely right!
That's what we call Proof of Identity.

In reply to @persono.id:matrix.org

We don't see simple solution. - Me either... You kan replace your key, but you can't replace what you are... BUT you can also break what you are (loosing part of the body, getting ill, etc...)

You can't replace WHO you are, absolutely right!
That's what we call Proof of Identity.

<@persono.id:matrix.org> > > We don't see simple solution. - Me either... You kan replace your key, but you can't replace what you are... BUT you can also break what you are (loosing part of the body, getting ill, etc...)

You can't replace WHO you are, absolutely right!
That's what we call Proof of Identity.

But that also means that once YOU are compromised, you can't do anything with it, doensn't it?

Like if I have your fingerprint and make it public, well, you are zucked

Nit quite.
Auth systems become more sophisticated.
Weins, voice, movements, face. And today it only can be safely combined with other methods. Besides there are many solutions in other areas, why not use it? Like banking transactions use a postponed transactions to prevent fraud. False-positive word in case of highjack. The access to the system to make tx may have only authenticated persons.
And even if you're kidnapped and forced to make some tx you should have an opportunity to roll back exactly that transaction. Like storno (corrections) accountants use, you know.
How would you solve it? Well, use virtually false-positive password to confirm tx. It might be a special combination of fingerprints, a word you pronounce, anything that let's the system know that you're in trouble. This is much, much deeper that might seem first.