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|Despite coalition proposals to monitor public email, there remain numerous free or low-cost methods to keep messages private. You already know how to keep messages private: you just encrypt the contents using a password. But although this kind of technology has been freely available to PC users since Phil Zimmermann launched PGP (Pretty Good Privacy) in 1991, hardly anyone uses it. The benefits of email and online messaging are that they are fast and relatively frictionless -- you don't need to address an envelope, find a stamp, walk to a post box and so on -- and encryption becomes an annoyance.
The problem with the latest government attempts at snooping is that they are not concerned with the content of messages, but their existence...