e.catalina.authenticator.SingleSignOn</strong>.</p>
      </td></tr><tr><td><code class="attributeName">requireReauthentication</code></td><td>
        <p>Default false. Flag to determine whether each request needs to be
        reauthenticated to the security <strong>Realm</strong>. If "true", this
        Valve uses cached security credentials (username and password) to
        reauthenticate to the <strong>Realm</strong> each request associated
        with an SSO session.  If "false", the Valve can itse