an class="mord mtight"><span class="mord mtight">22</span></span></span></span></span></span></span></span></span></span></span></span> seconds to crack a ciphertext encrypted with a 256-bit key. This amounts to <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.7278em;vertical-align:-0.0833em;"></span><span class="mord">8.53</span><span class="mspace" style="margin-right:0.2222em;"></span><span class="mbin">×</span><span class="mspace" st