Anonymous cloud data storage and anonymizing non-anonymous storage

摘要

A process of writing to a non-anonymous cloud storage is provided. On a client side, a write request to block X is received. A block key for the block numbers X is calculates as a function, which uses an Anonymous Key and X as its arguments. A hash function value of the block key is calculated. The content and the hash value are transferred to a Virtual Cloud Service. Then, on the Virtual Cloud Service, public cloud accounts are selected based on part of the hash value. A file name is generated from the calculated hash value. The content of block X is stored to the file with the generated name within the selected cloud account. Thus, there is no data reflecting the ownership of the user files on the cloud storage that is revealed.