"Unsurprisingly, Elbakyan’s project has drawn the ire of publishers. Last year, Elsevier sued Sci-Hub and an associated website called Library Genesis for violating its copyright. The two websites “operate an international network of piracy and copyright infringement by circumventing legal and authorized means of access to the ScienceDirect database,” Elsevier’s lawyers wrote in a court filing, referring to the company’s subscription database.
"A judge for the New York Southern District Court ruled in favor of the publisher, and Sci-Hub’s domain, sci-hub.org, was shut down. Soon, the service popped up again under a different domain.
"But even if the new domain gets shut down, too, Sci-Hub will still be accessible on the dark web, a part of the Internet often associated with drugs, weapons, and child porn. Like its seedy dark-web neighbors, the Sci-Hub site is accessible only through Tor, a network of computers that passes web requests through a randomized series of servers in order to preserve visitors’ anonymity."