<itemizedlist><listitem><para><literal>arch=<replaceable>arch1</replaceable>,<replaceable>arch2</replaceable>,…</literal>
can be used to specify for which architectures packages information should
be downloaded. If this option is not set all architectures defined by the
- <literal>APT::Architectures</literal> option will be downloaded.</para>
- </listitem></itemizedlist></para>
+ <literal>APT::Architectures</literal> option will be downloaded.</para></listitem>
+ <listitem><para><literal>trusted=yes</literal> can be set to indicate that packages
+ from this source are always authenificated even if the <filename>Release</filename> file
+ is not signed or the signature can't be checked. This disables parts of &apt-secure;
+ and should therefore only be used in a local and trusted context. <literal>trusted=no</literal>
+ is the opposite which handles even correctly authenificated sources as not authenificated.</para></listitem>
+ </itemizedlist></para>
<para>It is important to list sources in order of preference, with the most
preferred source listed first. Typically this will result in sorting