The Edward Snowden guide to encryption: Fugitive’s 12-minute homemade video ahead of leaks explaining how to avoid NSA from tracking emails

Ordinary people must learn to scramble their emails, privacy campaigners said today, as an encryption how-to video made by Edward Snowden was made public for the first time.

The former NSA employee who blew the whistle on the agency's all-pervasive online surveillance made the video to teach reporters how to communicate with him in secret.