The dark web is no longer just a marketplace for illicit drugs, weapons, and other nefarious material. Mainstream media and social networks, from The New York Times to Facebook, are also using it to give users an anonymous way to access their sites. These so-called "onion" services can help publishers evade country-specific web censorship, while also delivering their content to people who simply use the Tor Network to surf in private. The tradeoff for anonymity is a sluggish web browsing experience, but it's a sacrifice more than 2 million people are willing to make. Now, with its almost decade-old onion domains getting rusty, Tor is unveiling its next-gen sites, with the focus on strengthening security.