It&#x27;s sad that so many comments concentrate on whether luggage is secure in the first place. Of course it is not. 
The real issue is that having a backdoor makes a new class of attacks possible. A wilful or accidental leak, for example. Or you can reverse engineer the master key if you have enough locks.<p>The big impact is that one leak kills the security of all locks (of that type).<p>I don&#x27;t think this would necessarily be the case when looking at (publicly) backdoored encryption. Here, you could have an individual backdoor key for each &quot;lock&quot;. Of course, the mass storage of backdoor keys make a mass-leak also more probable.