Passwords don’t work. Good ones are hard to remember. Memorable ones are easy to crack. “Human beings for the life of us cannot manage passwords,” says Aarti Shahani, technology correspondent for NPR. “We just can’t do it. It’s not happening. There’s proof we don’t know how to do it.” It’s reassuring to hear a tech reporter confirm that password anxiety is nothing to be ashamed of. Having recently returned from Mobile World Congress (MWC) in Barcelona she has seen some of the tech industry’s newest biometric solutions to humanity’s password incompetence. Some of them sound like they could create a whole new level of privacy paranoia.