May 23, 2026

Photograph: Michael Calore The walls of the bag are tough enough, made from 1,200-denier polyester, which is heavy-duty and water-resistant, not to mention so rugged that it’s nearly indestructible. I’ve checked it as luggage on a dozen or so flights, and it doesn’t show any scuffs or tears. The zipper at the top isn’t sealed,…

The original version of this story appeared in Quanta Magazine. For the past few decades, researchers have understood that quantum computers should eventually be able to crack the widely used codes that secure much of the digital world. To protect against this fate, they’ve spent years developing new codes that appear to be safe from…