this post was submitted on 03 Jul 2023
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ethfinance
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Sign in with Ethereum (or something like PGP) does not interact with the blockchain. You simply sign a message with your private key.
the thing is though that using private keys hasn't taken off for online logins because it's cumbersome in many cases, and having it tied to a wallet doesn't really improve on that (plus it will scare people of because "blockchain = scam"). That's one area where google and apple et al. are making some progress, with storing credentials in secure storage, once people are used to not entering passwords anymore it'll be much easier to switch to a private key