key.</p>
<p>As noted in the “Default behavior” section above, this means using an
auto-detected driver (OpenSSL has a higher priority), the AES-128 ciper
in CBC mode, and your <code class="docutils literal"><span class="pre">$config['encryption_key']</span></code> value.</p>
<p>If you wish to change that however, you need to use the <code class="docutils literal"><span class="pre">initialize()</span></code>
method. It accepts an associative array of parameters, all of which are
optional:</p>
<table bord