I reached out to support about this in December and wanted to see if anyone who owns a Librem Key could give a more definitive answer. The Librem Key is based on the Nitrokey Pro v2, which according to page 3 of its datasheet has slots for “3 x RSA 2048-4096 bit or 3 x ECC 256-521 bit, 1 x AES-128 or AES-256” keys.
The Librem Key technical specs list the key slots as “Three key slots supporting RSA 2048-4096 bit and ECC 256-512 bit.”
I was told that Purism’s CSO thought the “ECC 521 bit” key was a typo in the Nitrokey datasheet and that the Librem Key “should” support AES 128 and 256 bit keys, but that they hadn’t had a chance to test it. I checked the specs page again today out of curiosity and saw that it hasn’t been updated to reflect whether or not AES keys are supported.
- Is there such a thing as an ECC 512 bit key, or should this be ECC 521 bit?
- Can anyone confirm whether or not the Librem Key supports AES 128 and 256 bit keys?