Aside from a few cryptographic details (like which elliptic curve to use), this system is identical to [BitId](https://github.com/bitid/bitid https://github.com

Aside from a few cryptographic details (like which elliptic curve to use), this system is identical to [BitId](https://github.com/bitid/bitid https://github.com/bitid/bitid). BitID is already being deployed in the Bitcoin ecosystem. For instance, you can see it on the buy/sell service [Glidera](https://www.glidera.io/loginbitidqr https://www.glidera.io/loginbitidqr). One benefit of doing this in the context of Bitcoin is that users already have mobile apps that can manage private keys (with backups) and scan QR codes. With Bitcoin, if you lose your keys, you lose money, so there is a tremendous incentive for both users and wallet authors to get this stuff right. Using the same technology for logging in an easy next step.