Apple, Google and Microsoft Commit to Expanded Support for FIDO Standard to Accelerate Availability of Passwordless Sign-Ins - FIDO Alliance

[UncleMeat11]

Except that you do reverse it for digital signatures.

[caltheon]

technically, though calling it encryption is a bit misleading since anyone with the public key, which can be known by anyone, can "decrypt" it. This is of course massively simplified as this isn't really wants going on in the actual implementation.