Patent ID: 8924529
Filing Date: 2014-12-30
Classification: G06F

Abstract:
1. A method comprising: receiving a first access request at a server from a client device over a network; generating, by the server, an encoded modified date for a server-based object in response to the first access request, wherein the encoded modified date comprises a unique identifier for the client device; transmitting the server-based object with the encoded modified date from the server to the client device over the network; storing, at the server, the encoded modified date that comprises the unique identifier for the client device with different encoded modified dates for the server-based object that comprise unique identifiers for other client devices; receiving, during a second access request at the server from the client device that is subsequent to transmitting the server-based object to the client device, a request for the server-based object by the client device, the request for the server-based object comprises a request whether a present version of the server-based object that is newer than the encoded modified date is available; and identifying the client device at the server by matching the encoded modified date in the request for the server-based object with the stored encoded modified date that comprises the unique identifier for the client device.