“Edward Snowden’s revelations about the NSA’s mass internet surveillance is driving development of a slew of new email tools aimed at providing end-to-end encryption to users, and it has boosted interest in existing privacy tools too. Jon Callas, a Silent Circle founder, says his company is planning to take another run at secure email. He says he’s primarily concerned with email metadata like the sender, receiver and subject line, as well as the IP addresses and transit server information in the header of encrypted email.”
http://www.wired.com/threatlevel/2013/09/the-scramble-to-build-encryption/
