  <varlistentry>
  <term><emphasis remap='B'>ppk</emphasis></term>
  <listitem>
<para>EXPERIMENTAL: Post-quantum preshared keys (PPKs) to be used. Currently the accepted values are
<emphasis remap='B'>propose</emphasis> or <emphasis remap='B'>yes</emphasis>
(the default), signifying we propose to use PPK for this connection;
<emphasis remap='B'>insist</emphasis>, signifying we allow communication
only if PPK is used for key derivation;
<emphasis remap='B'>never</emphasis> or <emphasis remap='B'>no</emphasis>,
signifying that PPK should not be used for key derivation.
PPKs can be used in connections that allow only IKEv2. In libreswan that would
mean that ikev2 option must have value <emphasis remap='B'>insist</emphasis>.
 (currently based on draft-fluhrer-qr-ikev2, not raft-ietf-ipsecme-qr-ikev2-00)
</para>
  </listitem>
  </varlistentry>
