Assange's company recently released nearly 300 files of secret data called the "Spy Files." Assange says the documents expose the reach of the global surveillance industry.
"Who here has an iPhone?" Assange questioned at a makeshift press conference. "Who here has a Blackberry? Who here uses Gmail? Well, you are all screwed."
The data dump comes just days before Assange is to appear in British superior court to fight his extradition to Sweden.
Assange faces allegations of rape and sexual molestation from two women he met in 2010.