Rerouting traffic through proxies or virtual private networks, known as VPNs, often helps access websites that have been blocked by authoritarian governments. But tech-savvy system administrators in countries like China , Russia , Belarus  and Iran  have long since recognized and sought to plug these loopholes. That's why these administrators have begun building their own segregated internet ecosystems complete with online banking, trading and social media platforms. These splinternets, as they'