Yubikey 4 and newer supports 4096 bit keys with PGP:
https://www.yubico.com/products/compare-yubikey-4-neo/
https://www.yubico.com/products/compare-yubikey-5-series/
Re:Nitrokey
by laksdjfkasljdf on Thursday August 27, 2020 @08:24PM
(#24300211)
where do you see that information on that page?
All the way at the bottom of the table, under "Cryptographic Specifications".
Recent versions also have support for plenty of ECC algorithms, see https://www.yubico.com/blog/whats-new-in-yubikey-firmware-5-...
Re:Nitrokey
by trishankdatadog on Friday August 28, 2020 @01:07PM
(#24307294)
It's not well-documented, but non-FIPS can support 4096. FIPS goes up to 3072 for, well, FIPS reasons.
Is this still the case? their site only have pgp support as a binary option on the models, no extra info anywhere to be found on their search.