If two MIT students have it their way, physical keys are about to become a thing of the past. At the recent Def Con Hacker Conference, these students announced they've developed a piece of software that enables Schlage Primus keys – the de facto standard of security keys – to be easily replicated with a professional 3-D printer.

Not only does this have far-reaching implications for the world at large, it puts a target directly on the backs of both 3D Systems (NYSE:DDD) and Stratasys (NASDAQ:SSYS). In the video below, Fool.com contributor Steve Heller gives 3-D printing investors the details they need to know about this development.

Fool contributor Steve Heller owns shares of 3D Systems. The Motley Fool recommends 3D Systems and Stratasys. The Motley Fool owns shares of 3D Systems and Stratasys and has the following options: short January 2014 $36 calls on 3D Systems and short January 2014 $20 puts on 3D Systems. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.