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The yubikey neo (which is what I also have) only supports 2048 bit GPG keys. The yubikey 4 supports 4096 bit keys but doesn't support NFC.

• nickik 11y ago
  Yes. I am waiting for the a Yubikey with 4096 bit keys and NFC. They should release one in 2016.
• StavrosK 11y ago
  Oops, thanks, I'll try to cancel my order.