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Wow, this looks really cool. Yubikey 4 lacked NFC support so with 5 it's easy to use the same key via USB-A (laptop) and NFC (via OpenKeychain on Android). It

by Leace 8y ago

Wow, this looks really cool. Yubikey 4 lacked NFC support so with 5 it's easy to use the same key via USB-A (laptop) and NFC (via OpenKeychain on Android). It appears that RSA 4096 keys can be used via NFC, no other NFC-capable keys have this. One issue is that the algorithms did not change compared to 4. No ed25519, probably due to no tamper-resistant parts with this on the market.

georgyo 8y ago
Also the highest ECC is still p384 and does not support p521. However it is still really nice that it support rsa 4096 over NFC now.
- mtgx 8y ago
  I'd rather they support X25519 and X448 anyway.
  - watersb 8y ago
    Maybe their FIPS-140 certification prioritized the NIST curves? (speculation)