More broadly that sounds more like web1, not web3.
For sign in there are distributed ways. SQRL by Steve Gibson is one, that is just first and second party. No third party needed, distributed or not.
But really, any public key system, like gpg web of trust would do it.
You could even do mTLS, with self-signed certs. Or build an identity tree with signed certs.
Like all things Blockchain there's always the open question to any solution of "but why not just do it without the Blockchain, and it'll be better faster stronger?".
Indeed i see many stories of solutions where they ended up just removing the Blockchain in the end, with no loss of functionality.
If you write up your thoughts then please look at non-blockchain alternatives.
Like why is a gpg key not identity, or not good enough, but a Blockchain solution would be?
For sign in there are distributed ways. SQRL by Steve Gibson is one, that is just first and second party. No third party needed, distributed or not.
But really, any public key system, like gpg web of trust would do it.
You could even do mTLS, with self-signed certs. Or build an identity tree with signed certs.
Like all things Blockchain there's always the open question to any solution of "but why not just do it without the Blockchain, and it'll be better faster stronger?".
Indeed i see many stories of solutions where they ended up just removing the Blockchain in the end, with no loss of functionality.
If you write up your thoughts then please look at non-blockchain alternatives.
Like why is a gpg key not identity, or not good enough, but a Blockchain solution would be?