I have a Yubikey NFC 5, when I enter a wrong PIN or PUK three times the smart card is blocked.

Can someone please explain to me how it is blocked ? Does the PIN/PUK functionality is disabled somehow ? Does it set a secret PIN (pretty stupid I believe) ?

How can I block or unblock a Yubikey (or any smartcard) programmatically ?

  • 1
    Read the support docs for User PIN lockout. The smart card is disabled not blocked - as in the physical key stops working.
    – Brian
    Commented Aug 12, 2020 at 18:43


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