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Added important note about pin caching #135

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Sun Knudsen 2019-10-19 14:05:49 -04:00
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@ -1578,6 +1578,8 @@ max-cache-ttl 120
pinentry-program /usr/bin/pinentry-curses
```
**Important** The `cache-ttl` options do **NOT** apply when using a YubiKey as a smartcard as the PIN is [cached by the smartcard itself](https://dev.gnupg.org/T3362). Therefore, in order to clear the PIN from cache (smartcard equivalent to `default-cache-ttl` and `max-cache-ttl`), you need to unplug the YubiKey.
**Tip** Set `pinentry-program /usr/bin/pinentry-gnome3` for a GUI-based prompt.
On macOS, use `brew install pinentry-mac` and adjust the program path to suit.