+<dt>USE_GPG</dt>
+<dd>When set to "yes", Brioche will encrypt the archives with GnuPG.
+See the <a class="reference internal" href="#encryption-with-gnupg">Encryption with GnuPG</a> section below for a detailed explanation on
+how to use GnuPG with Brioche.</dd>
+<dt>GPG_KEY</dt>
+<dd>The identifier of the public GnuPG key to use when encrypting the archives.
+This is the key that will be needed in case of restore.</dd>
+<dt>GPG_PASSPHRASE</dt>
+<dd>The passphrase for the GnuPG private key used to encrypt the archives.</dd>