Psychiatrists have been using inkblots to reach into the minds of their patients for almost a century, but now, researchers at Carnegie Mellon University are using the splotches to protect your passwords.

The new security setting, called GOTCHA (Generating panOptic Turing Tests to Tell Computers and Humans Apart) has users create a password. The computer then generates several colorful inkblots and asks the user to describe each image with a phrase. When the user returns, they’re asked to input their password and match the inkblots with their custom phrases.