an be specified in the <span class="productname">OpenSSL</span>
   configuration file, you can specify ciphers specifically for use by
   the database server by modifying <a class="xref" href="runtime-config-connection.html#GUC-SSL-CIPHERS">ssl_ciphers</a> in
   <code class="filename">postgresql.conf</code>.
  </p><div class="note"><h3 class="title">Note</h3><p>
    It is possible to have authentication without encryption overhead by
    using <code class="literal">NULL-SHA</code> or <code class="literal">N