Zero knowledge means a very specific thing in cryptography, and is used exclusively to refer to zero knowledge proofs; in all of cryptographic literature over t

Zero knowledge means a very specific thing in cryptography, and is used exclusively to refer to zero knowledge proofs; in all of cryptographic literature over the past 25 years I have not seen any other usage of "zero knowledge". Either way, this system isn't "zero knowledge", even if that term were well defined for this situation; you leak file sizes and access patterns.