Actually LNURL-auth [1] has nothing to do with blockchains except that it makes it dead simple to use a Lightning wallet, such as Breez, to log in. All it does

Actually LNURL-auth [1] has nothing to do with blockchains except that it makes it dead simple to use a Lightning wallet, such as Breez, to log in. All it does is send a request, get a random string, sign that with the private key, and send it back alongside with the public key and the signature. Yes, it works. Yes, it is simple. No, it has nothing to do with blockchains. Websites like http://stacker.news http://stacker.news are using this. See https://lightninglogin.live https://lightninglogin.live