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May 13, 2025
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docs: Changed wording for default management key value and algorithm #233

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13 changes: 6 additions & 7 deletions docs/users-manual/application-piv/pin-puk-mgmt-key.md
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Expand Up @@ -53,17 +53,16 @@ data is 192 bits long, but because of the "parity bits", only 168 bits supply th
strength. In addition, because of certain attacks on Triple-DES, the actual effective bit
strength of a key is 112.

The YubiKey is manufactured with the standard default PIN, PUK, and managment key values:
The YubiKey is manufactured with the following default PIN, PUK, and management key values:

* PIN: "123456"
* PUK: "12345678"
* Management Key: (Firmware Version 5.6 and below: Triple-DES / 5.7 and above: AES-192),
0x010203040506070801020304050607080102030405060708\
0102030405060708 three times
* Management Key: "010203040506070801020304050607080102030405060708"

Note that the PIV standard specifies these default/initial values. For firmware 5.4 YubiKeys that allow AES, the default
management key is Triple-DES. For firmware 5.7 and above
YubiKeys, the default management key is AES-192.
Note that the PIV standard specifies these default values. And while the management key value is
consistent across YubiKeys, the management key *algorithm* depends on a key's firmware version.
For firmware 5.6 and earlier, the default management key algorithm is Triple-DES; for firmware
5.7 and later, the default algorithm is AES-192.

Upon receipt of the YubiKey, it is a good idea to change the PIN, PUK, and management key from the default values. See
[PivSession.TryChangePin](xref:Yubico.YubiKey.Piv.PivSession.TryChangePin%2a), [PivSession.TryChangePuk](xref:Yubico.YubiKey.Piv.PivSession.TryChangePuk),
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