Photograph courtesy of the author.

In an office-building lobby in San Francisco, there is a wall where about one hundred lava lamps simultaneously flow. They are not just decorating the wall; they are helping to encrypt the internet. 

The lava wall is owned by a software company called Cloudflare. A camera photographs the lava lamps, whose patterns are constantly shifting. Each image is then digitized and stored as a series of numbers. This analog process produces sequences that, in their organic variance, are more unpredictable than anything a computer could generate on its own. With the help of its lava lamps, Cloudflare encrypts at least 10 percent of global web traffic. Read More