Z:gnu-www-ja-surveillance-vs-democracy--80ba36-For privacy about who you exch/en

For privacy about who you exchange email with, a simple partial solution is for you and others to use email services in a country that would never cooperate with your own government, and which communicate with each other using encryption. However, Ladar Levison (owner of the mail service Lavabit that US surveillance sought to corrupt completely) has a more sophisticated idea for an encryption system through which your email service would know only that you sent mail to some user of my email service, and my email service would know only that I received mail from some user of your email service, but it would be hard to determine that you had sent mail to me.