They can use something like self-encryption[0] from MaidSafe, which shows them duplication so They can save space. They would still see that multiple users keep

They can use something like self-encryption[0] from MaidSafe, which shows them duplication so They can save space. They would still see that multiple users keep same file, but it's way better then current state. Only problem what I see is illegal content, because If uploader changes just only one bit in file, they will not be able to detect it. [0] https://github.com/maidsafe/self_encryption https://github.com/maidsafe/self_encryption