With just half a dozen close friends online, she has a strict regimen to remain invisible on the web. Each night she wipes every one of her web accounts and deletes every email in her inbox. She has no physical hard drive and boots her computer from a microSD card. “I could hide this card anywhere or chew into a million pieces in a few seconds,” she says by e-mail. She keeps her operating system on a USB stick and uses a virtual machine (VM) to carry out her online shenanigans.