In the left corner, Julian Assange, founder of WikiLeaks and the original 21st century champion of exposing government secrecy via whistleblowers. In the right corner, Glenn Greenwald, journalist and columnist whose National Security Agency reporting has shed light on mass government abuse of privacy. Assange is about to celebrate his second anniversary living in the Ecuadorian Embassy in London as he avoids an investigation into alleged sexual misconduct in Sweden. Greenwald, meanwhile, has won a Pulitzer for his reporting, for The Guardian newspaper.