 <a href="../man7/EVP_PKEY-X25519.html">EVP_PKEY-X25519(7)</a>. See <a href="../man3/EVP_PKEY_encapsulate.html">EVP_PKEY_encapsulate(3)</a> and <a href="../man3/EVP_PKEY_decapsulate.html">EVP_PKEY_decapsulate(3)</a> for more info.</p>

<h2 id="X25519-and-X448-KEM-parameters">X25519 and X448 KEM parameters</h2>

<dl>

<dt id="operation-OSSL_KEM_PARAM_OPERATION-UTF8-string">&quot;operation&quot; (<b>OSSL_KEM_PARAM_OPERATION</b>)&lt;UTF8 string&gt;</dt>
<dd>

<p>The OpenSSL X25519 and X448 Key Encapsulation Me