It turns out, the majority of Bluetooth smart locks you see on the market can easily be hacked and opened by unauthorized users. The news comes from DEF CON hacker conference in Las Vegas, where security researchers revealed the vulnerability, adding that concerned OEMs are doing little to nothing to patch the hole. Tom's Guide reports: Researcher Anthony Rose, an electrical engineer, said that of 16 Bluetooth smart locks he and fellow researcher Ben Ramsey had tested, 12 locks opened when wirelessly attacked. The locks -- including models made by Quicklock, iBlulock, Plantraco, Ceomate, Elecycle, Vians, Okidokey and Mesh Motion -- had security vulnerabilities that ranged from ridiculously easy to moderately difficult to exploit. "We figured we'd find vulnerabilities in Bluetooth Low Energy locks, then contact the vendors. It turned out that the vendors actually don't care," Rose said. "We contacted 12 vendors. Only one responded, and they said, 'We know it's a problem, but we're not gonna fix it.'" The problems didn't lie with the Bluetooth Low Energy protocol itself, Rose said, but in the way the locks implemented Bluetooth communications, or with a lock's companion smartphone app. Four locks, for example, transmitted their user passwords in plaintext to smartphones, making it easy for anyone with a $100 Bluetooth sniffer to pluck the passwords out of thin air.