- More secure microcontroller supporting secure boot, PUF, flash encryption, etc.
- Firmware rewritten in rust.
- Much more robust and durable construction.
- Touch buttons, reversible USB-A, USB-C
NFC is passively operated similar to other authenticators and is more reliable.
ED255 is supported in V2!
Personally, I would prefer flush mount and/or tactile buttons, but NBD.
Hope they will be available on other than kickstarter, as I never got it to work, with all their tracking and what-not.
Does it support installing more than one key?
There’s no constrain on the number of keys. You can use 1 device with unlimited sites, both v1 and v2, because keys are generated on-the-fly and not stored.
(There’s a limit on number of resident keys, and we supported 50 in v1, while for example yubikeys support 25. So far these are rarely used, if ever.)
Somu can store 50 resident keys exactly like Solo v1, as it has exactly the same MCU. In both there's a single master secret that's used to derive the (non-resident) keys. That's the only thing that's unique.
The only things I see are 10x faster NFC, and "reversible", whatever that means.
Does reversible mean you can plug it in without looking, because there is no upside-down?
It is far from clear what the NFC feature actually does. Does it mean it doesn't need to be plugged into the USB port to work? Uses passive components, or draws enough power from NFC to operate?
I know that v1 (or, anyway, Somu) supported only ECDSA keys, not ED25519, and only one key per physical device. Is that changed?