[politelemon]

> A passkey on a phone can also be used to sign in on a nearby device. For example, an Android user can now sign in to a passkey-enabled website using Safari on a Mac. Similarly, passkey support in Chrome means that a Chrome user, for example on Windows, can do the same using a passkey stored on their iOS device.

> Since passkeys are built on industry standards, this works across different platforms and browsers - including Windows, macOS and iOS, and ChromeOS, with a uniform user experience.

I see no mention of Linux in these examples, which tells me that users having access to their keys is not a primary concern for these implementations?

[oezi]

It seems the client side is baked into browsers rather than being something which leverages a local implementation for key storage.