Wouldn&#x27;t Solitaire [1] be a better argument (of this vein) against banning encryption?  It&#x27;s reasonably strong and doesn&#x27;t even require a computer.  Much more practically memorized.<p>[1] <a href="https:&#x2F;&#x2F;www.schneier.com&#x2F;solitaire.html" rel="nofollow">https:&#x2F;&#x2F;www.schneier.com&#x2F;solitaire.html</a>