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by conorpp 1994 days ago
New in V2:

- 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!
2 comments
labawi 1993 days ago
If ED works with ssh, I'm very interested and I'll buy a few as long as price isn't outrageous - I don't mind supporting development. I have a couple of somu, but ed25519 didn't seem to pan out (haven't tried).

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.

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ncmncm 1994 days ago
Did I guess right what "reversible" means? Maybe the page should actually say, so readers are not obliged to guess. My first thought was that it had USB-C on one end and USB-A on the other. But studying the pics did not confirm that.

Does it support installing more than one key?

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ecesena 1994 days ago
Reversible refers to the plug. USB-C is of course reversible, and USB-A also is.

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.)

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ncmncm 1993 days ago
I have a Somu. The docs I have found say it can only store one resident key. Is it particularly limited, vs. the Solo v1?
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ecesena 1993 days ago
No, it's incorrect. Do you have a link so we can fix?

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.

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