And will be able to go back and retroactively be able to see what all a person was looking at. Say they get ahold of a pdf that's anti-govrenment. They just hash that and see who all was reading it months before, before their system even knew about it. How much data does it take for the system to send a hash of every file you open? A few KB a day.
And will be able to go back and retroactively be able to see what all a person was looking at. Say they get ahold of a pdf that's anti-govrenment. They just hash that and see who all was reading it months before, before their system even knew about it. How much data does it take for the system to send a hash of every file you open? A few KB a day.
Exactly. It can even go deeper. There are algorithms for getting a lossy fingerprint of an image such that you can find similar images in a resolution independent way by comparing the fingerprints--it's what services like tineye do. So it doesn't even have to be the exact image.
Exactly. It can even go deeper. There are algorithms for getting a lossy fingerprint of an image such that you can find similar images in a resolution independent way by comparing the fingerprints--it's what services like tineye do. So it doesn't even have to be the exact image.
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