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<h1 id="introduction"><a class="header" href="#introduction">Introduction</a></h1>
<p>The most naive mode of operation is called <em>Electronic Cookboook (ECB)</em> mode. It divides the message into blocks <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.7167em;vertical-align:-0.2861em;"></span><span class="mord"><span class="mord mathnormal">μ</span><span class="msupsub"><span class="