Interesting idea, and even more potentialy practical than you suggest: >You'd need some sort of super-fast-3D printer Nah, just a modern electronic key duplic

Interesting idea, and even more potentialy practical than you suggest: >You'd need some sort of super-fast-3D printer Nah, just a modern electronic key duplicator. You can find a lot of kiosks and such these days that make use of tools like JMA's Multicode electronic key cutting machine [0]. No need for additive manufacturing here, just have a standard blank and very high precision fast subtractive is mature technology. Would not at all be a big deal to just feed an algorithm generated pattern into it instead of having it scan an existing key. In fact, I don't think the algorithm even necessarily needs to be proprietary or secret here? The specific threat scenario in this case involves those with brief access to the luggage between when you drop it off with the airport for flight and when you retrieve it again at arrival. Key cutting machines aren't exactly pocketable, so the fact that theoretically somebody could go to any kiosk or private machine and make copied keys in practice doesn't mean they can bring a machine into the cargo area and make use of it in real time. And with mass variation of keys and no single master, there is no way for an attacker to just have all the keys needed with them. Even the cost doesn't seem like more than a drop in the bucket on the scale of these things. I don't know if it's actually a significant enough deal to bother with, but if it was this does seem like a potential easy low tech solution. ---- 0: http://www.jmausa.com/productosdetalle.aspx?idproducto=157 http://www.jmausa.com/productosdetalle.aspx?idproducto=157