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Adds instructions on changing the PUK
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README.md
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README.md
@ -34,6 +34,7 @@ If you have a comment or suggestion, please open an [Issue](https://github.com/d
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- [Export public keys](#export-public-keys)
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- [Export public keys](#export-public-keys)
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- [Configure Smartcard](#configure-smartcard)
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- [Configure Smartcard](#configure-smartcard)
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* [Change PIN](#change-pin)
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* [Change PIN](#change-pin)
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* [Change PUK](#change-puk)
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* [Set information](#set-information)
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* [Set information](#set-information)
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- [Transfer keys](#transfer-keys)
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- [Transfer keys](#transfer-keys)
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* [Signing](#signing-1)
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* [Signing](#signing-1)
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@ -1269,9 +1270,17 @@ Use the [YubiKey Manager](https://developers.yubico.com/yubikey-manager) applica
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## Change PIN
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## Change PIN
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The default PIN is `123456` and default Admin PIN (PUK) is `12345678`. CCID-mode PINs can be up to 127 ASCII characters. They have to be at least 6 (PIN) or 8 (PUK) ASCII characters.
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Your Yubikey has 2 PINs: The user PIN, which is used for end-user functionality such as signing and encryption and an admin PIN which is required for updating your information on the Yubikey. Entering the user PIN incorrectly three times consecutively will cause the PIN to become blocked.
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The Admin PIN is required for some card operations and to unblock a PIN that has been entered incorrectly more than three times. See the GnuPG documentation on [Managing PINs](https://www.gnupg.org/howtos/card-howto/en/ch03s02.html) for details.
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Name|Default Value
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---|---
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PIN|`123456`
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Admin PIN|`12345678`
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PUK|`12345678`
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CCID-mode PINs can be up to 127 ASCII characters. They have to be at least 6 (PIN) or 8 (PUK) ASCII characters. See the GnuPG documentation on [Managing PINs](https://www.gnupg.org/howtos/card-howto/en/ch03s02.html) for details.
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First set your admin and user PINs:
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```console
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```console
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gpg/card> admin
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gpg/card> admin
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@ -1307,6 +1316,19 @@ Q - quit
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Your selection? q
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Your selection? q
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```
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```
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## Change PUK
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The PUK (Pin Unlock Key) can be used to reset the PIN if it is ever lost or becomes blocked after the maximum number of incorrect attempts (default 3). The default PUK is `12345678`. If the PUK is also entered incorrectly three times, the key is permanently irrecoverable. You can set your PUK to the same as your daily PIN, giving you a total of 6 attempts.
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```console
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ykman piv change-puk
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Enter your current PUK:
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Enter your new PUK:
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Repeat for confirmation:
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New PUK set.
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```
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## Set information
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## Set information
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Some fields are optional.
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Some fields are optional.
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