I think government interference in the engineering decisions of private companies are a valid reason to oppose crypto backdoors. I don&#x27;t think it&#x27;s the strongest reason --- we ask private companies to expend extra effort to comply with engineering requirements in all sorts of other products. But I sympathize with the argument.<p>A warrant isn&#x27;t an engineering technique or a mathematical axiom. It&#x27;s a directive from a court that its recipient must comply with a demand to produce some information. Warrants are, in some sense, about people.<p>If you encrypt some piece of information such that you retain the ability to decrypt and recover it, then as far as the law is concerned, you&#x27;re capable of responding to a warrant for that information. Technology is going to make it possible for <i>everyone</i>, not just the tech savvy, to refuse to comply with those kinds of warrants. Public policy will need to adapt. As I said, we may not like how it adapts.