&synopsis-param-filename; or if the filename is <literal>-</literal>
from standard input.
</para>
-
+ <para>
+ It is critical that keys added manually via <command>apt-key</command> are
+ verified to belong to the owner of the repositories they claim to be for
+ otherwise the &apt-secure; infrastructure is completely undermined.
+ </para>
</listitem>
</varlistentry>
<varlistentry><term><option>adv</option></term>
<listitem>
<para>
-
- Pass advanced options to gpg. With adv --recv-key you can download the
- public key.
-
+ Pass advanced options to gpg. With <command>adv --recv-key</command> you
+ can e.g. download key from keyservers directly into the the trusted set of
+ keys. Note that there are <emphasis>no</emphasis> checks performed, so it is
+ easy to completely undermine the &apt-secure; infrastructure if used without
+ care.
</para>
</listitem>