Dark Mail Alliance : Lavabit, Silent Circle team up to create surveillance-proof email.
►http://www.slate.com/blogs/future_tense/2013/10/30/dark_mail_alliance_lavabit_silent_circle_team_up_to_create_surveillance.html
Existing forms of email encryption, like PGP, can be used to encrypt the content of an email. But PGP cannot encrypt the “subject” header or metadata like the “to” and “from” fields, and the average user can find it too complicated to use. Dark Mail promises to address both of these issues in the form of an easy-to-use iOS app and an Android app. There will also be desktop versions for Mac and Windows users. People using the technology will still be able to send emails to friends or colleagues using Gmail and Hotmail—but when sending messages to non-Dark Mail users, a warning will be displayed, making it clear that the communication could be intercepted.