Before an entire bikeshed discussion arises over the misused term "zero-knowledge", know that the author is sensitive to this issue and will likely correct it soon [1].
>The reason why I am using it is mainly for marketing purpose.
>I am going to change the term to zero leakage, what do you guys think?
The author may change it to Uber Super Duper The Best of The Filesystems in the entire Observable and the non observable parallel universes, makes more sense.