inter to the parent EVP_RAND_CTX as argument to the EVP_RAND_CTX_new() call. It is possible to create chains of more than two DRBG in a row. It is also possible to use any EVP_RAND_CTX class as the parent, however, only a live entropy source may ignore and not use its parent.</p>

<h1 id="THE-THREE-SHARED-DRBG-INSTANCES">THE THREE SHARED DRBG INSTANCES</h1>

<p>Currently, there are three shared DRBG instances, the &lt;primary&gt;, &lt;public&gt;, and &lt;private&gt; DRBG. While the &lt;primary&gt; DRBG is a