"You don't need expensive tools or anything," says encryption expert Barry Wels. "Any 15-year-old who's motivated can learn how to do it in 15 minutes on the Internet."
After talking to two locksmiths who had heard of bump keys, we found at least two high-security locks that resist bumping: Mul-T-Lock® and Medeco.
The Medeco Locks website has an article about combating bump keys. Medeco Locks have high-security cylinders have a unique telescopic pin-tumbler mechanism with internal and external pins that prevent bumping. Both the internal and external shear lines must be aligned simultaneously in order for the plug to rotate. The Mul-T-Lock® patented plug has a unique structure. When the top and bottom pins, plug and body meet, a three-dimensional shear line is formed to an almost perfectly spherical shape.
