Somu

A tiny FIDO2 security key for two-factor authentication and passwordless login

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Somu is a tiny, FIDO2 security key, that you can use on your Google, Twitter, GitHub account for two-factor authentication, or on your Microsoft account for passwordless login. Somu fits in your USB port, so you’ll never forget your key again.

Somu is our micro version of Solo. We were inspired to make a secure Tomu, so we took its tiny form factor, we added the secure microcontroller and firmware of Solo, et voilĂ ! Here we have Somu.

We know your next question, and the answer is yes! With your help, during this campaign we’ll be building the much-awaited support for SSH/GPG. We plan to add ECDSA keys first, followed by Ed25519.

Comparisons to Tomu & Solo

Tomu

Similar: the tiny form factor

Differences:

  • Supports FIDO2 in addition to U2F
  • Secure processor: STM32L432KC (with TRNG, security isolation for keys, two levels of locked flash)
  • 1 RGB led
  • New bootloader, can upgrade firmware, can restart in DFU

Solo

Similar: same secure processor and firmware

Differences:

  • Fits in the USB port
  • 2 touch buttons*

* in our FIDO2 firmware the 2 buttons behave as a single one

Specifications

  • Supported protocols: FIDO2, U2F
  • Supported operating systems: Microsoft Windows, Mac OS X, Linux, Chrome OS
  • Supported browsers: Chrome, Firefox, Edge, and soon Safari (WebAuthn is under development)
  • Secure processor: STM32L432KC (with TRNG, security isolation for keys, two levels of locked flash)
  • Crypto algorithms: ECC P256 (as per FIDO2 standard)
  • Interface: USB-A
  • Size: 0.5 x 0.5 x 0.1 inches (13 x 13 x 2.4 mm)
  • Weight: 0.11 ounces (3g)

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