At the recent DefCon conference in Las Vegas, researchers opened many of the top commercially available gun safes with simple tools like a straw or a paper clip, and in one case, just by shaking it a bit. The investigation began after the researchers, Toby Bluzmanis, Marc Tobias and Matt Fiddler, learned that certain Stack-On safes, issued to some law enforcement officials to secure their firearms at home, could be opened simply by jiggling the doorknob.