Hotel Key Cards Can Be Defeated

A security researcher has found that key cards used on more than 4 million hotel room doors worldwide may be vulnerable to attack.

According to, Mozilla software developer Cody Brocious will demonstrate on Day One of the Black Hat Briefings how a device that cost less than $50 can crack the encryption used by Onity, one of the larger hotel room lock vendors.

However, in a pre-Black Hat demonstration, security reporter Andy Greenberg found that Brocious could only open one of the three test doors. Brocious told Forbes the issue might be in the timing of his device and he might be able to fix that by the time he demonstrates it live at Black Hat.