Patent ID: 9424433
Filing Date: 2016-08-23
CPC Classification: G06F

Claim Text:
1. A method of data storage management, the method comprising, at a server: sending a request to a remote client for a proof of possession information; receiving a data upload request from the remote client, the data upload request relating to data stored at the remote client and the data upload request including information identifying the data, and wherein the data upload request does not include the data; determining that a duplicate of the data is stored at a data storage device; receiving the proof of possession information derived by the client by applying a one way function to a specific portion of the data using client authorization information known to the server and the client, wherein the specific portion of the data is indicated in the request to the client for the proof of possession information, wherein the specific portion of the data is different for different users; and on the basis of the received information, determining whether to allow the client or a user associated with the client to subsequently access the duplicate data stored at the data storage device.