But someone could still prove that a document, of a certain size, had been sent out at a certain time, to a certain mailbox.” “Traffic analysis.” “Yes. But what if one jams it? Why couldn’t I fill my hard drive with random bytes, so that individual files would not be discernible? Their very existence would be hidden in the noise, like a striped tiger in tall grass. And we could continually stream random noise back and forth to each other.”
