ject supports <TT>REINITIALIZE-INSTANCE</TT>:</P><DIV CLASS="lisp-symbol"><A NAME="reinitialize-instance"></A><TT><STRONG>reinitialize-instance</STRONG> <EM>(mac hmac)</EM> <EM><TT>&rest</TT></EM> <EM>initargs</EM> <EM><TT>&key</TT></EM> <EM>key</EM> <EM><TT>&allow-other-keys</TT></EM> =&gt; <EM>hmac</EM></TT><BR /></DIV><P>The <TT>:KEY</TT> argument is the secret key, as provided to <A HREF="#make-hmac" STYLE="symbol">make-hmac</A>.</P><DIV CLASS="lisp-symbol"><A NAME="update-hmac"></A><TT><STRONG>update-h