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Merge branch 'master' of https://github.com/Amolith/YubiKey-Guide into Amolith-master

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@ -2297,21 +2297,53 @@ To require a touch for each key operation, install [YubiKey Manager](https://dev
Authentication:
```console
$ ykman openpgp set-touch aut fixed
$ ykman openpgp set-touch aut on
```
Signing:
```console
$ ykman openpgp set-touch sig fixed
$ ykman openpgp set-touch sig on
```
Encryption:
```console
$ ykman openpgp set-touch enc fixed
$ ykman openpgp set-touch enc on
```
Depending on how the YubiKey is going to be used, you may want to look at the policy options for each of these and adjust the above commands accordingly. They can be viewed with the following command:
```
$ ykman openpgp set-touch -h
Usage: ykman openpgp set-touch [OPTIONS] KEY POLICY
Set touch policy for OpenPGP keys.
KEY Key slot to set (sig, enc, aut or att).
POLICY Touch policy to set (on, off, fixed, cached or cached-fixed).
The touch policy is used to require user interaction for all operations using the private key on the YubiKey. The touch policy is set indivdually for each key slot. To see the current touch policy, run
$ ykman openpgp info
Touch policies:
Off (default) No touch required
On Touch required
Fixed Touch required, can't be disabled without a full reset
Cached Touch required, cached for 15s after use
Cached-Fixed Touch required, cached for 15s after use, can't be disabled
without a full reset
Options:
-a, --admin-pin TEXT Admin PIN for OpenPGP.
-f, --force Confirm the action without prompting.
-h, --help Show this message and exit.
```
If the YubiKey is going to be used within an email client that opens and verifies encrypted mail, `Cached` or `Cached-Fixed` may be desirable.
YubiKey will blink when it is waiting for a touch. On Linux you can also use [yubikey-touch-detector](https://github.com/maximbaz/yubikey-touch-detector) to have an indicator or notification that YubiKey is waiting for a touch.
# Email