"This means that user data will be reproduced and recopied even more than it already is...how does that give users a greater control over privacy at all?" http

"This means that user data will be reproduced and recopied even more than it already is...how does that give users a greater control over privacy at all?" https://en.wikipedia.org/wiki/Encryption https://en.wikipedia.org/wiki/Encryption In particular, if we ignore the issue of patents (which we should, since when are patents on math valid?), this is a promising approach: https://en.wikipedia.org/wiki/Attribute_based_encryption https://en.wikipedia.org/wiki/Attribute_based_encryption