Shortly after The Washington Post inadvertently published a photo of seven TSA master keys, a group of security experts were able to copy their designs and release their 3D models online. Now, these same experts have deciphered the secrets of the eighth and last master key the agency uses even without a photo to guide them. The first seven keys are manufactured by a company called Travel Sentry, while this one is by a separate manufacturer named Safe Skies. Since the hackers didn't have a photo of the last key, they bought as many Safe Skies locks as possible, took them apart and examined their innards. Anyone with access to a 3D printer can now reproduce all eight keys.