A Listening Post special on the 'Snowden effect' and challenges to the media in the age of state supervision. We spoke to journalists and technologists at the forefront of the effort to keep our communications - both the content and its related metadata - unavailable to the governments who might take advantage of them. With their help, this special edition of the Listening Post introduces systems such as PGP, TOR and SecureDrop - all essential tools for the security conscious journalist and for whistleblowers who want to keep their identities under wraps.