&gt; The Fourth Amendment guarantees your privacy, but police can break down your door and seize your financial and medical records if they have reasonable grounds to suspect you. Why should your smartphone be different?<p>One problem with this analogy is that the police don&#x27;t mandate that everyone&#x27;s door be easy to break down and thereby make all houses easier to burglarize. Another is that you <i>know</i> when someone has broken down your door.<p>If phones must have back doors, those back doors will become known to others besides the US Government. Imagine if every time you traveled abroad, you knew that airport security could take your phone and get all the data on it, or maybe add malware.<p>&gt; If you don&#x27;t trust your smartphone to be impregnable, then guess what? Don&#x27;t put your medical &amp; financial info on your smartphone. There was an epoch when we actually did banking &amp; medicine without smartphones.<p>You can say the same thing about laptops, or even paper files. &quot;You&#x27;re not allowed to take effective security measures to protect your info because we might want it&quot; is a bad policy.