; (<b>OSSL_KEM_PARAM_IKME</b>) &lt;octet string&gt;</dt>
<dd>

<p>Used to specify the key material used for generation of the ephemeral key. This value should not be reused for other purposes. It should have a length of at least 32 for X25519, and 56 for X448. If this value is not set, then a random ikm is used.</p>

</dd>
</dl>

<h1 id="CONFORMING-TO">CONFORMING TO</h1>

<dl>

<dt id="RFC9180">RFC9180</dt>
<dd>

</dd>
</dl>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man3/EVP_PKEY_CTX_set_kem_op.html"